It works here:
21:02:23: Preprocessing...
21:02:23: Created SER file pp_test_Siril.ser
21:02:23: Number of images allowed in the FITS write queue: 24 (zero or less is unlimited)
21:02:23: 42376 corrected pixels (0 + 42376)
21:02:23: Preprocessing: processing...
21:02:23: writer: Saving image 0, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 1, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 2, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 3, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 4, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 5, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 6, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: Sequence processing succeeded.
21:02:23: Execution time: 196.52 ms.
21:02:23: writer: Saving image 7, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 8, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 9, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 10, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 11, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 12, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 13, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 14, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 15, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 16, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 17, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 18, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: writer: Saving image 19, 1 layer(s), 1304x976 pixels, 16 bits
21:02:23: Saved 20 images in the sequence
21:02:23: Number of images allowed in the FITS write queue: 0 (zero or less is unlimited)
21:02:23: Sequence loaded: pp_test_Siril (0->19)
21:02:23: Closing sequence /home/cyril/Bureau/test_Siril/test_Siril