2024 crashing when exporting animation

What might be preventing one file being exported as a video from 2024, but ok from 2023.
I can’t share the file.

There are apparently some bugs in animation export for SU 24 particular to windows. AFAIK the workaround is currently to use 23.

Correct, roll-back to v2023.

My experience with v2024 is that there are too many bugs to make it useful for my purposes.