Siril 1.4.1 keeps crashing on my macbook -

Here is the end of log before python crashes - using Siril preprocessing for Dwarf 3 telescope with python script nazstronomy smart telescope - anybody know why?

21:16:39: Apply registration: processing...
21:16:39: Reading FITS: file bkg_pp_lights_00001.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:39: Reading FITS: file bkg_pp_lights_00034.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:39: Reading FITS: file bkg_pp_lights_00024.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:39: Reading FITS: file bkg_pp_lights_00060.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:39: Reading FITS: file bkg_pp_lights_00043.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:39: Reading FITS: file bkg_pp_lights_00052.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:39: Reading FITS: file bkg_pp_lights_00013.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:39: Saving FITS: file r_bkg_pp_lights_00024.fit, 3 layer(s), 3953x2357 pixels, 32 bits
21:16:39: Reading FITS: file bkg_pp_lights_00025.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:40: Saving FITS: file r_bkg_pp_lights_00043.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:40: Reading FITS: file bkg_pp_lights_00044.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:40: Saving FITS: file r_bkg_pp_lights_00060.fit, 3 layer(s), 3927x2308 pixels, 32 bits
21:16:40: Reading FITS: file bkg_pp_lights_00061.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:40: Saving FITS: file r_bkg_pp_lights_00052.fit, 3 layer(s), 3887x2235 pixels, 32 bits
21:16:40: Saving FITS: file r_bkg_pp_lights_00034.fit, 3 layer(s), 3901x2259 pixels, 32 bits
21:16:40: Reading FITS: file bkg_pp_lights_00053.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:40: Reading FITS: file bkg_pp_lights_00035.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:40: Saving FITS: file r_bkg_pp_lights_00013.fit, 3 layer(s), 3991x2429 pixels, 32 bits
21:16:40: Saving FITS: file r_bkg_pp_lights_00001.fit, 3 layer(s), 4044x2534 pixels, 32 bits
21:16:40: Reading FITS: file bkg_pp_lights_00014.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:40: Reading FITS: file bkg_pp_lights_00002.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:41: Saving FITS: file r_bkg_pp_lights_00025.fit, 3 layer(s), 3939x2329 pixels, 32 bits
21:16:41: Reading FITS: file bkg_pp_lights_00026.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:41: Saving FITS: file r_bkg_pp_lights_00044.fit, 3 layer(s), 3860x2187 pixels, 32 bits
21:16:41: Reading FITS: file bkg_pp_lights_00045.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:41: Saving FITS: file r_bkg_pp_lights_00061.fit, 3 layer(s), 3943x2339 pixels, 32 bits
21:16:41: Saving FITS: file r_bkg_pp_lights_00053.fit, 3 layer(s), 3891x2242 pixels, 32 bits
21:16:41: Reading FITS: file bkg_pp_lights_00062.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:41: Reading FITS: file bkg_pp_lights_00054.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:41: Saving FITS: file r_bkg_pp_lights_00035.fit, 3 layer(s), 3896x2252 pixels, 32 bits
21:16:42: Reading FITS: file bkg_pp_lights_00036.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:42: Saving FITS: file r_bkg_pp_lights_00014.fit, 3 layer(s), 3987x2422 pixels, 32 bits
21:16:42: Reading FITS: file bkg_pp_lights_00015.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:42: Saving FITS: file r_bkg_pp_lights_00002.fit, 3 layer(s), 4042x2528 pixels, 32 bits
21:16:42: Reading FITS: file bkg_pp_lights_00003.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:42: Saving FITS: file r_bkg_pp_lights_00026.fit, 3 layer(s), 3935x2322 pixels, 32 bits
21:16:42: Reading FITS: file bkg_pp_lights_00027.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:42: Saving FITS: file r_bkg_pp_lights_00045.fit, 3 layer(s), 3864x2195 pixels, 32 bits
21:16:42: Reading FITS: file bkg_pp_lights_00046.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:42: Saving FITS: file r_bkg_pp_lights_00054.fit, 3 layer(s), 3896x2250 pixels, 32 bits
21:16:42: Reading FITS: file bkg_pp_lights_00055.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:43: Saving FITS: file r_bkg_pp_lights_00062.fit, 3 layer(s), 3947x2346 pixels, 32 bits
21:16:43: Reading FITS: file bkg_pp_lights_00063.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:43: Saving FITS: file r_bkg_pp_lights_00036.fit, 3 layer(s), 3892x2245 pixels, 32 bits
21:16:43: Reading FITS: file bkg_pp_lights_00037.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:43: Saving FITS: file r_bkg_pp_lights_00015.fit, 3 layer(s), 3984x2415 pixels, 32 bits
21:16:43: Reading FITS: file bkg_pp_lights_00016.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:43: Saving FITS: file r_bkg_pp_lights_00003.fit, 3 layer(s), 4038x2522 pixels, 32 bits
21:16:43: Reading FITS: file bkg_pp_lights_00004.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:43: Saving FITS: file r_bkg_pp_lights_00027.fit, 3 layer(s), 3931x2315 pixels, 32 bits
21:16:43: Reading FITS: file bkg_pp_lights_00028.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:43: Saving FITS: file r_bkg_pp_lights_00046.fit, 3 layer(s), 3868x2202 pixels, 32 bits
21:16:43: Reading FITS: file bkg_pp_lights_00047.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:44: Saving FITS: file r_bkg_pp_lights_00055.fit, 3 layer(s), 3907x2272 pixels, 32 bits
21:16:44: Reading FITS: file bkg_pp_lights_00056.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:44: Saving FITS: file r_bkg_pp_lights_00063.fit, 3 layer(s), 3951x2353 pixels, 32 bits
21:16:44: Saving FITS: file r_bkg_pp_lights_00037.fit, 3 layer(s), 3893x2245 pixels, 32 bits
21:16:44: Reading FITS: file bkg_pp_lights_00064.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:44: Reading FITS: file bkg_pp_lights_00038.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:44: Saving FITS: file r_bkg_pp_lights_00016.fit, 3 layer(s), 3981x2409 pixels, 32 bits
21:16:44: Reading FITS: file bkg_pp_lights_00017.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:44: Saving FITS: file r_bkg_pp_lights_00004.fit, 3 layer(s), 4036x2516 pixels, 32 bits
21:16:44: Saving FITS: file r_bkg_pp_lights_00028.fit, 3 layer(s), 3927x2308 pixels, 32 bits
21:16:44: Reading FITS: file bkg_pp_lights_00005.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:44: Reading FITS: file bkg_pp_lights_00029.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:44: Saving FITS: file r_bkg_pp_lights_00047.fit, 3 layer(s), 3872x2209 pixels, 32 bits
21:16:44: Reading FITS: file bkg_pp_lights_00048.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:45: Saving FITS: file r_bkg_pp_lights_00056.fit, 3 layer(s), 3911x2279 pixels, 32 bits
21:16:45: Reading FITS: file bkg_pp_lights_00057.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:45: Saving FITS: file r_bkg_pp_lights_00064.fit, 3 layer(s), 3955x2360 pixels, 32 bits
21:16:45: Saving FITS: file r_bkg_pp_lights_00038.fit, 3 layer(s), 3888x2238 pixels, 32 bits
21:16:45: Reading FITS: file bkg_pp_lights_00065.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:45: Reading FITS: file bkg_pp_lights_00039.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:45: Saving FITS: file r_bkg_pp_lights_00017.fit, 3 layer(s), 3977x2403 pixels, 32 bits
21:16:45: Reading FITS: file bkg_pp_lights_00018.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:45: Saving FITS: file r_bkg_pp_lights_00029.fit, 3 layer(s), 3924x2301 pixels, 32 bits
21:16:45: Reading FITS: file bkg_pp_lights_00030.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:45: Saving FITS: file r_bkg_pp_lights_00005.fit, 3 layer(s), 4032x2509 pixels, 32 bits
21:16:45: Reading FITS: file bkg_pp_lights_00006.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:46: Saving FITS: file r_bkg_pp_lights_00048.fit, 3 layer(s), 3876x2216 pixels, 32 bits
21:16:46: Reading FITS: file bkg_pp_lights_00049.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:46: Saving FITS: file r_bkg_pp_lights_00057.fit, 3 layer(s), 3915x2287 pixels, 32 bits
21:16:46: Reading FITS: file bkg_pp_lights_00058.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:46: Saving FITS: file r_bkg_pp_lights_00039.fit, 3 layer(s), 3885x2231 pixels, 32 bits
21:16:46: Reading FITS: file bkg_pp_lights_00040.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:46: Saving FITS: file r_bkg_pp_lights_00065.fit, 3 layer(s), 3959x2367 pixels, 32 bits
21:16:46: Reading FITS: file bkg_pp_lights_00066.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:46: Saving FITS: file r_bkg_pp_lights_00018.fit, 3 layer(s), 3973x2396 pixels, 32 bits
21:16:46: Reading FITS: file bkg_pp_lights_00019.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:47: Saving FITS: file r_bkg_pp_lights_00030.fit, 3 layer(s), 3920x2294 pixels, 32 bits
21:16:47: Reading FITS: file bkg_pp_lights_00031.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:47: Saving FITS: file r_bkg_pp_lights_00006.fit, 3 layer(s), 4029x2503 pixels, 32 bits
21:16:47: Reading FITS: file bkg_pp_lights_00007.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:47: Saving FITS: file r_bkg_pp_lights_00040.fit, 3 layer(s), 3881x2224 pixels, 32 bits
21:16:47: Saving FITS: file r_bkg_pp_lights_00049.fit, 3 layer(s), 3875x2214 pixels, 32 bits
21:16:47: Reading FITS: file bkg_pp_lights_00041.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:47: Reading FITS: file bkg_pp_lights_00050.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:48: Saving FITS: file r_bkg_pp_lights_00058.fit, 3 layer(s), 3919x2293 pixels, 32 bits
21:16:48: Reading FITS: file bkg_pp_lights_00059.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:48: Saving FITS: file r_bkg_pp_lights_00031.fit, 3 layer(s), 3912x2280 pixels, 32 bits
21:16:48: Reading FITS: file bkg_pp_lights_00032.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:48: Saving FITS: file r_bkg_pp_lights_00066.fit, 3 layer(s), 3962x2375 pixels, 32 bits
21:16:48: Reading FITS: file bkg_pp_lights_00067.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:49: Saving FITS: file r_bkg_pp_lights_00019.fit, 3 layer(s), 3971x2390 pixels, 32 bits
21:16:49: Reading FITS: file bkg_pp_lights_00020.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:51: Saving FITS: file r_bkg_pp_lights_00041.fit, 3 layer(s), 3877x2216 pixels, 32 bits
21:16:51: Reading FITS: file bkg_pp_lights_00042.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:51: Saving FITS: file r_bkg_pp_lights_00050.fit, 3 layer(s), 3880x2221 pixels, 32 bits
21:16:51: Reading FITS: file bkg_pp_lights_00051.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:51: Saving FITS: file r_bkg_pp_lights_00007.fit, 3 layer(s), 4018x2481 pixels, 32 bits
21:16:51: Saving FITS: file r_bkg_pp_lights_00059.fit, 3 layer(s), 3923x2300 pixels, 32 bits
21:16:51: Reading FITS: file bkg_pp_lights_00008.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:52: Reading FITS: file bkg_pp_lights_00074.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:52: Saving FITS: file r_bkg_pp_lights_00032.fit, 3 layer(s), 3908x2273 pixels, 32 bits
21:16:52: Reading FITS: file bkg_pp_lights_00033.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:52: Saving FITS: file r_bkg_pp_lights_00067.fit, 3 layer(s), 3961x2371 pixels, 32 bits
21:16:52: Reading FITS: file bkg_pp_lights_00068.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:52: Saving FITS: file r_bkg_pp_lights_00020.fit, 3 layer(s), 3968x2384 pixels, 32 bits
21:16:52: Reading FITS: file bkg_pp_lights_00021.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:54: Saving FITS: file r_bkg_pp_lights_00042.fit, 3 layer(s), 3873x2210 pixels, 32 bits
21:16:54: Reading FITS: file bkg_pp_lights_00080.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:54: Saving FITS: file r_bkg_pp_lights_00051.fit, 3 layer(s), 3884x2228 pixels, 32 bits
21:16:54: Saving FITS: file r_bkg_pp_lights_00008.fit, 3 layer(s), 4015x2474 pixels, 32 bits
21:16:54: Reading FITS: file bkg_pp_lights_00086.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:54: Reading FITS: file bkg_pp_lights_00009.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:56: Saving FITS: file r_bkg_pp_lights_00074.fit, 3 layer(s), 3999x2445 pixels, 32 bits
21:16:56: Reading FITS: file bkg_pp_lights_00075.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:57: Saving FITS: file r_bkg_pp_lights_00068.fit, 3 layer(s), 3965x2379 pixels, 32 bits
21:16:57: Reading FITS: file bkg_pp_lights_00069.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:57: Saving FITS: file r_bkg_pp_lights_00033.fit, 3 layer(s), 3904x2266 pixels, 32 bits
21:16:57: Reading FITS: file bkg_pp_lights_00092.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:58: Saving FITS: file r_bkg_pp_lights_00021.fit, 3 layer(s), 3963x2377 pixels, 32 bits
21:16:58: Reading FITS: file bkg_pp_lights_00022.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:16:59: Saving FITS: file r_bkg_pp_lights_00080.fit, 3 layer(s), 4020x2486 pixels, 32 bits
21:16:59: Reading FITS: file bkg_pp_lights_00081.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:01: Saving FITS: file r_bkg_pp_lights_00086.fit, 3 layer(s), 4054x2554 pixels, 32 bits
21:17:01: Reading FITS: file bkg_pp_lights_00087.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:01: Saving FITS: file r_bkg_pp_lights_00009.fit, 3 layer(s), 4011x2468 pixels, 32 bits
21:17:01: Reading FITS: file bkg_pp_lights_00010.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:02: Saving FITS: file r_bkg_pp_lights_00075.fit, 3 layer(s), 4003x2452 pixels, 32 bits
21:17:02: Reading FITS: file bkg_pp_lights_00076.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:02: Saving FITS: file r_bkg_pp_lights_00069.fit, 3 layer(s), 3969x2386 pixels, 32 bits
21:17:03: Reading FITS: file bkg_pp_lights_00070.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:03: Saving FITS: file r_bkg_pp_lights_00092.fit, 3 layer(s), 4074x2593 pixels, 32 bits
21:17:03: Reading FITS: file bkg_pp_lights_00093.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:03: Saving FITS: file r_bkg_pp_lights_00022.fit, 3 layer(s), 3961x2370 pixels, 32 bits
21:17:03: Reading FITS: file bkg_pp_lights_00023.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:05: Saving FITS: file r_bkg_pp_lights_00081.fit, 3 layer(s), 4024x2493 pixels, 32 bits
21:17:05: Reading FITS: file bkg_pp_lights_00082.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:06: Saving FITS: file r_bkg_pp_lights_00010.fit, 3 layer(s), 4007x2461 pixels, 32 bits
21:17:06: Reading FITS: file bkg_pp_lights_00011.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:07: Saving FITS: file r_bkg_pp_lights_00076.fit, 3 layer(s), 4007x2459 pixels, 32 bits
21:17:07: Reading FITS: file bkg_pp_lights_00077.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:07: Saving FITS: file r_bkg_pp_lights_00087.fit, 3 layer(s), 4057x2561 pixels, 32 bits
21:17:07: Reading FITS: file bkg_pp_lights_00088.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:07: Saving FITS: file r_bkg_pp_lights_00023.fit, 3 layer(s), 3957x2363 pixels, 32 bits
21:17:08: Reading FITS: file bkg_pp_lights_00097.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:08: Saving FITS: file r_bkg_pp_lights_00093.fit, 3 layer(s), 4077x2601 pixels, 32 bits
21:17:08: Reading FITS: file bkg_pp_lights_00094.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:08: Saving FITS: file r_bkg_pp_lights_00070.fit, 3 layer(s), 3973x2394 pixels, 32 bits
21:17:08: Reading FITS: file bkg_pp_lights_00071.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:11: Saving FITS: file r_bkg_pp_lights_00082.fit, 3 layer(s), 4028x2500 pixels, 32 bits
21:17:11: Reading FITS: file bkg_pp_lights_00083.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:13: Saving FITS: file r_bkg_pp_lights_00011.fit, 3 layer(s), 4004x2455 pixels, 32 bits
21:17:13: Reading FITS: file bkg_pp_lights_00012.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:13: Saving FITS: file r_bkg_pp_lights_00077.fit, 3 layer(s), 4010x2466 pixels, 32 bits
21:17:13: Reading FITS: file bkg_pp_lights_00078.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:13: Saving FITS: file r_bkg_pp_lights_00088.fit, 3 layer(s), 4061x2568 pixels, 32 bits
21:17:14: Saving FITS: file r_bkg_pp_lights_00071.fit, 3 layer(s), 3976x2401 pixels, 32 bits
21:17:14: Reading FITS: file bkg_pp_lights_00089.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:14: Reading FITS: file bkg_pp_lights_00072.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:14: Saving FITS: file r_bkg_pp_lights_00097.fit, 3 layer(s), 4102x2655 pixels, 32 bits
21:17:14: Reading FITS: file bkg_pp_lights_00098.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:14: Saving FITS: file r_bkg_pp_lights_00094.fit, 3 layer(s), 4080x2607 pixels, 32 bits
21:17:14: Reading FITS: file bkg_pp_lights_00095.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:15: Saving FITS: file r_bkg_pp_lights_00083.fit, 3 layer(s), 4031x2507 pixels, 32 bits
21:17:15: Reading FITS: file bkg_pp_lights_00084.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:16: Saving FITS: file r_bkg_pp_lights_00012.fit, 3 layer(s), 4001x2448 pixels, 32 bits
21:17:16: Reading FITS: file bkg_pp_lights_00102.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:21: Saving FITS: file r_bkg_pp_lights_00078.fit, 3 layer(s), 4014x2474 pixels, 32 bits
21:17:21: Reading FITS: file bkg_pp_lights_00079.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:21: Saving FITS: file r_bkg_pp_lights_00089.fit, 3 layer(s), 4065x2575 pixels, 32 bits
21:17:21: Reading FITS: file bkg_pp_lights_00090.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:21: Saving FITS: file r_bkg_pp_lights_00072.fit, 3 layer(s), 3980x2409 pixels, 32 bits
21:17:21: Reading FITS: file bkg_pp_lights_00073.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:22: Saving FITS: file r_bkg_pp_lights_00098.fit, 3 layer(s), 4107x2663 pixels, 32 bits
21:17:22: Reading FITS: file bkg_pp_lights_00099.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:22: Saving FITS: file r_bkg_pp_lights_00084.fit, 3 layer(s), 4035x2514 pixels, 32 bits
21:17:22: Reading FITS: file bkg_pp_lights_00085.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:22: Saving FITS: file r_bkg_pp_lights_00095.fit, 3 layer(s), 4084x2614 pixels, 32 bits
21:17:22: Reading FITS: file bkg_pp_lights_00096.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:23: Saving FITS: file r_bkg_pp_lights_00102.fit, 3 layer(s), 4120x2691 pixels, 32 bits
21:17:23: Reading FITS: file bkg_pp_lights_00103.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:24: Saving FITS: file r_bkg_pp_lights_00079.fit, 3 layer(s), 4017x2479 pixels, 32 bits
21:17:24: Reading FITS: file bkg_pp_lights_00106.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:24: Saving FITS: file r_bkg_pp_lights_00090.fit, 3 layer(s), 4068x2582 pixels, 32 bits
21:17:24: Reading FITS: file bkg_pp_lights_00091.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:24: Saving FITS: file r_bkg_pp_lights_00073.fit, 3 layer(s), 3995x2437 pixels, 32 bits
21:17:24: Reading FITS: file bkg_pp_lights_00110.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:25: Saving FITS: file r_bkg_pp_lights_00099.fit, 3 layer(s), 4109x2669 pixels, 32 bits
21:17:25: Reading FITS: file bkg_pp_lights_00100.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:25: Saving FITS: file r_bkg_pp_lights_00085.fit, 3 layer(s), 4050x2546 pixels, 32 bits
21:17:25: Reading FITS: file bkg_pp_lights_00114.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:30: Saving FITS: file r_bkg_pp_lights_00096.fit, 3 layer(s), 4087x2621 pixels, 32 bits
21:17:30: Reading FITS: file bkg_pp_lights_00118.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:31: Saving FITS: file r_bkg_pp_lights_00103.fit, 3 layer(s), 4118x2686 pixels, 32 bits
21:17:31: Reading FITS: file bkg_pp_lights_00104.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:31: Saving FITS: file r_bkg_pp_lights_00091.fit, 3 layer(s), 4070x2586 pixels, 32 bits
21:17:31: Saving FITS: file r_bkg_pp_lights_00106.fit, 3 layer(s), 4127x2707 pixels, 32 bits
21:17:31: Reading FITS: file bkg_pp_lights_00121.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:31: Reading FITS: file bkg_pp_lights_00107.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:32: Saving FITS: file r_bkg_pp_lights_00110.fit, 3 layer(s), 4152x2764 pixels, 32 bits
21:17:32: Reading FITS: file bkg_pp_lights_00111.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:32: Saving FITS: file r_bkg_pp_lights_00114.fit, 3 layer(s), 4165x2792 pixels, 32 bits
21:17:32: Reading FITS: file bkg_pp_lights_00115.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:32: Saving FITS: file r_bkg_pp_lights_00100.fit, 3 layer(s), 4113x2676 pixels, 32 bits
21:17:32: Reading FITS: file bkg_pp_lights_00101.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:33: Saving FITS: file r_bkg_pp_lights_00118.fit, 3 layer(s), 4181x2829 pixels, 32 bits
21:17:33: Reading FITS: file bkg_pp_lights_00119.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:34: Saving FITS: file r_bkg_pp_lights_00104.fit, 3 layer(s), 4121x2693 pixels, 32 bits
21:17:34: Reading FITS: file bkg_pp_lights_00105.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:40: Saving FITS: file r_bkg_pp_lights_00121.fit, 3 layer(s), 4194x2859 pixels, 32 bits
21:17:40: Reading FITS: file bkg_pp_lights_00122.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:40: Saving FITS: file r_bkg_pp_lights_00107.fit, 3 layer(s), 4131x2715 pixels, 32 bits
21:17:40: Reading FITS: file bkg_pp_lights_00108.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:40: Saving FITS: file r_bkg_pp_lights_00111.fit, 3 layer(s), 4156x2770 pixels, 32 bits
21:17:41: Reading FITS: file bkg_pp_lights_00112.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:41: Saving FITS: file r_bkg_pp_lights_00101.fit, 3 layer(s), 4117x2684 pixels, 32 bits
21:17:41: Reading FITS: file bkg_pp_lights_00124.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:41: Saving FITS: file r_bkg_pp_lights_00115.fit, 3 layer(s), 4172x2808 pixels, 32 bits
21:17:41: Reading FITS: file bkg_pp_lights_00116.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:41: Saving FITS: file r_bkg_pp_lights_00119.fit, 3 layer(s), 4184x2836 pixels, 32 bits
21:17:42: Reading FITS: file bkg_pp_lights_00120.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:42: Saving FITS: file r_bkg_pp_lights_00105.fit, 3 layer(s), 4124x2700 pixels, 32 bits
21:17:42: Reading FITS: file bkg_pp_lights_00127.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:44: Saving FITS: file r_bkg_pp_lights_00108.fit, 3 layer(s), 4134x2722 pixels, 32 bits
21:17:44: Reading FITS: file bkg_pp_lights_00109.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:44: Saving FITS: file r_bkg_pp_lights_00122.fit, 3 layer(s), 4197x2865 pixels, 32 bits
21:17:44: Reading FITS: file bkg_pp_lights_00123.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:44: Saving FITS: file r_bkg_pp_lights_00112.fit, 3 layer(s), 4159x2778 pixels, 32 bits
21:17:45: Reading FITS: file bkg_pp_lights_00113.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:45: Saving FITS: file r_bkg_pp_lights_00124.fit, 3 layer(s), 4202x2879 pixels, 32 bits
21:17:45: Reading FITS: file bkg_pp_lights_00125.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:49: Saving FITS: file r_bkg_pp_lights_00116.fit, 3 layer(s), 4176x2815 pixels, 32 bits
21:17:49: Reading FITS: file bkg_pp_lights_00117.fit, 3 layer(s), 3856x2180 pixels, 32 bits
21:17:49: FITS error: Error reading data buffer from file:
21:17:49: FITS error: /Users/aldisberzins/Desktop/Dwarf 3 Veil Process HACK Copy 3
21:17:49: FITS error: ffopen could not interpret primary array header of file: 
21:17:49: FITS error: /Users/aldisberzins/Desktop/Dwarf 3 Veil Process HACK Copy 3
21:17:49: FITS error: Error reading data buffer from file:
21:17:49: FITS error: /Users/aldisberzins/Desktop/Dwarf 3 Heart Nebula process
21:17:49: FITS error: ffopen could not interpret primary array header of file: 
21:17:49: FITS error: /Users/aldisberzins/Desktop/Dwarf 3 Heart Nebula process
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00127.fit
21:17:49: FITS error: Error writing elements 32479201 thru 32486400 of input data array (ffpcle).
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00125.fit
21:17:49: FITS error: Error writing elements 5349601 thru 5356800 of input data array (ffpcle).
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00125.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00125.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00127.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00127.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00117.fit
21:17:49: FITS error: Error writing elements 14401 thru 21600 of input data array (ffpcle).
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00123.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00120.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00123.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00113.fit
21:17:49: FITS error: Error writing elements 5608801 thru 5616000 of input data array (ffpcle).
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00117.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00123.fit
21:17:49: FITS error: Error writing elements 11196001 thru 11203200 of input data array (ffpcle).
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00123.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00123.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00120.fit
21:17:49: FITS error: Error writing elements 31514401 thru 31521600 of input data array (ffpcle).
21:17:49: FITS error: Error reading data buffer from file:
21:17:49: FITS error: r_bkg_pp_lights_00113.fit
21:17:49: FITS error: Extension doesn't start with SIMPLE or XTENSION keyword. (ffrhdu)
21:17:49: 21:17:49: FITS error: Error while closing HDU number 0 (ffchdu).
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00113.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00117.fit
21:17:49: FITS error: Error writing data buffer to file:
21:17:49: FITS error: r_bkg_pp_lights_00109.fit
21:17:49: FITS error: Error writing elements 14320801 thru 14328000 of input data array (ffpcle).
21:17:49: Sequence processing failed.
21:18:10: Transformation aborted.
21:18:10: Finalizing sequence processing failed.
21:18:10: Data error occurred: Command 'seqapplyreg' failed: Generic error
21:18:10: Registered Sequence
21:18:10: Cleaned up bkg_pp_lights_
21:18:10: Running seq_stack with arguments:
seq_name=r_bkg_pp_lights_
feather=False
feather_amount=20
21:18:10: Running command: stack r_bkg_pp_lights_  rej 3 3 -norm=addscale -output_norm  -rgb_equal -maximize -filter-included -32b -out=lights
21:18:10: Running command: setcompress
21:18:10: No compression enabled.
21:18:10: Running command: stack
21:18:10: Checking sequences in the directory: /Users/aldisberzins/Desktop/Dwarf 3 Heart Nebula process/process.
21:18:10: Loading sequence `r_bkg_pp_lights_' failed.
21:18:10: Command execution failed: invalid arguments.
21:18:10: Stacking failed: Command 'stack' failed: Argument error
21:18:10: Traceback (most recent call last):
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril/venv/lib/python3.12/site-packages/sirilpy/connection.py", line 382, in _send_command
21:18:10:     self.sock.sendall(msg)
21:18:10: OSError: [Errno 9] Bad file descriptor
21:18:10: The above exception was the direct cause of the following exception:
21:18:10: Traceback (most recent call last):
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril-scripts/preprocessing/Naztronomy-Smart_Telescope_PP.py", line 1916, in batch
21:18:10:     self.seq_stack(
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril-scripts/preprocessing/Naztronomy-Smart_Telescope_PP.py", line 975, in seq_stack
21:18:10:     self.siril.log(f"Completed stacking {seq_name}!", LogColor.GREEN)
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril/venv/lib/python3.12/site-packages/sirilpy/connection.py", line 667, in log
21:18:10:     self._execute_command(_Command.LOG_MESSAGE, packed_message)
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril/venv/lib/python3.12/site-packages/sirilpy/connection.py", line 431, in _execute_command
21:18:10:     status, response = self._send_command(command, payload, timeout)
21:18:10:                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril/venv/lib/python3.12/site-packages/sirilpy/connection.py", line 407, in _send_command
21:18:10:     raise SirilConnectionError(_("Error in _send_command(): {}").format(e)) from e
21:18:10: sirilpy.exceptions.SirilConnectionError: Error in _send_command(): [Errno 9] Bad file descriptor
21:18:10: During handling of the above exception, another exception occurred:
21:18:10: Traceback (most recent call last):
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril/venv/lib/python3.12/site-packages/sirilpy/connection.py", line 382, in _send_command
21:18:10:     self.sock.sendall(msg)
21:18:10: OSError: [Errno 9] Bad file descriptor
21:18:10: The above exception was the direct cause of the following exception:
21:18:10: Traceback (most recent call last):
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril-scripts/preprocessing/Naztronomy-Smart_Telescope_PP.py", line 1715, in on_run_clicked
21:18:10:     self.run_script(
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril-scripts/preprocessing/Naztronomy-Smart_Telescope_PP.py", line 2218, in run_script
21:18:10:     file_name = self.batch(
21:18:10:                 ^^^^^^^^^^^
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril-scripts/preprocessing/Naztronomy-Smart_Telescope_PP.py", line 1925, in batch
21:18:10:     self.siril.log(
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril/venv/lib/python3.12/site-packages/sirilpy/connection.py", line 667, in log
21:18:10:     self._execute_command(_Command.LOG_MESSAGE, packed_message)
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril/venv/lib/python3.12/site-packages/sirilpy/connection.py", line 431, in _execute_command
21:18:10:     status, response = self._send_command(command, payload, timeout)
21:18:10:                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
21:18:10:   File "/Users/aldisberzins/Library/Application Support/org.siril.Siril/siril/venv/lib/python3.12/site-packages/sirilpy/connection.py", line 407, in _send_command
21:18:10:     raise SirilConnectionError(_("Error in _send_command(): {}").format(e)) from e
21:18:10: sirilpy.exceptions.SirilConnectionError: Error in _send_command(): [Errno 9] Bad file descriptor
21:18:10: Python process (PID: 1312) terminated by signal 6

Hi and welcome! You might want to check file bkg_pp_lights_00117.fit seems like it might be corrupt or missing metadata?

Reading FITS always reads 3856x2180 pax whereas Saving FITS starts with 3953x2357 px and increases the size afterwards… Why?

Looks like a nazstronomy script issue. You should contact him.