Field Rotation circles in processed image

Hello, I’m new at processing FITS. I have a smart telescope and stacked images show strong field rotation. I don’t have Bias but I have Lights, Dark and Flats. I could not find a script without Bias so I used the Seestar script. Any help with this?

If you’ve used the SeeStar script, this means you haven’t used any darks. That’s to be expected.

Siril can also be used manually. The tutorials can guide you.

I used Seestar as a last resort because I couldn’t find a script that did not require Bias. Do you know of such script? Thanks

No because without bias you will have bad flat calibration. So it is better to use it, and really easy to shoot.

Mmm, not sure how to do this with a smart telescope. I found how to do a flat, but not Bias. I’ll search if there’s any info on that. Thanks