Export with normalize fails

Siril version: 0.99.6

Note: commit aaaa12a (from siril main screen)

Operating System: Windows 64bit

Package: website

Description of the bug

normalize images of a sequence fails and crashes siril

Here there is the log from the command line

Reading sequence file `mtf_pp_lights.seq'.
cfitsio was compiled with multi-thread support, parallel read of images will be possible
free_image_data() called, clearing loaded image
Read from FITS header: pix size 4.29x4.29, binning 1x1, focal 50
bitpix for the sequence is set as -32
log: Sequence loaded: mtf_pp_lights (0->384)
Purging previously saved reference frame data.
number of filtered-in images: 385
number of filtered-in images: 385
Saved the reference frame buffer for alignment preview.
log: Using registration information from layer 1 to export sequence
log: Film output needs to have a width that is a multiple of 32 and an even height, resizing selection.
final input area: 0,0,  5184x3464
number of filtered-in images: 385
number of filtered-in images: 385
log: Processing all images in the sequence (385)
log: Computing normalization...
Memory per image: 412 MB. Max memory: 10239 MB
log: With the current memory and thread (12) limits, up to 12 thread(s) can be used for sequence normalization
log: FITS error: Cannot get keyword number 31.  It does not exist.
log: FITS error: Cannot get keyword number 2.  It does not exist.
log: FITS error: Second keyword of the extension is not BITPIX:
log: FITS error: Failed to move to HDU number 213 (ffmahd).
log: FITS error: Extension doesn't start with SIMPLE or XTENSION keyword. (ffrhdu)
log: FITS error: Cannot get keyword number 15.  It does not exist.
log: FITS error: =ƒ╚Q=Ãö=¯Ýu=÷a▒=■ËÌ=ù£Ê<òð◄<↨)╦
log: FITS error: Extension doesn't start with SIMPLE or XTENSION keyword. (ffrhdu)
log: FITS error: =ƒ╚Q=ç►p=[iÊ>0º>çÙÀ>®
log: FITS error: Character 10 in this keyword is illegal. Hex Value = 14
log: FITS error:  Expected positive integer keyword NAXIS, but instead
log: FITS error:  found keyword  with value
log: FITS error: Failed to move to HDU number 179 (ffmahd).
log: FITS error: Extension doesn't start with SIMPLE or XTENSION keyword. (ffrhdu)
log: FITS error: >¥í4>n╝ð<òð◄=÷a▒>PÎ{=²ã¡<Ì║▒<a║;
log: FITS error: Extension doesn't start with SIMPLE or XTENSION keyword. (ffrhdu)
log: FITS error: ffgtkn found unexpected keyword or value for keyword no. 3.
log: FITS error: >┤îl>åøþ>¶¸t
log: FITS error: Name of keyword no. 17 contains illegal character(s): >┤îl>åøþ>¶¸t
log: FITS error: Failed to read the required image extension header keywords.
log: FITS error: Failed to move to HDU number 2 (ffmahd).
log: FITS error: >J»$=▀Íw
log: FITS error: Extension doesn't start with SIMPLE or XTENSION keyword. (ffrhdu)
log: FITS error: >J»$=▀Íw
log: FITS error: Failed to move to HDU number 160 (ffmahd).
log: FITS error: Failed to move to HDU number 64 (ffmahd).
log: Could not load frame 227 from FITS sequence mtf_pp_lights
lo

if you need anything to investigate let me know

Note: the sequence is not well shoot, it contains artificial light an foreground