Hello @Axstrxme and welcome to the forum 
Please see this topic which reports the same problem:
Timelapse Export Failed
It looks like you need to use ffmpeg version 6.1.1 from here:
https://www.gyan.dev/ffmpeg/builds/packages/ffmpeg-6.1.1-essentials_build.zip
If you’ve already been doing that, please say so.
Also, please post a screenshot of your timelapse Export window with as much information showing as possible, by widening the windows if needed.
It’s ok to obscure your Windows username but please don’t obscure anything else.
(I’ll now close down for the night.)