V3.0 not working after upgrade to stable release

I was previously using the early access version of VEAI 3.0.0.8, which was working perfectly. I updated to the stable release of 3.0, and now I am unable to process any videos. When I try to use the Proteus model, the app just crashes with no error message if I try to preview. If I try to export, I get an error: - Some parameter(s) may not be supported by the codec. Check FFmpeg command.

I get that same error no matter which model I try.

I failed.
I can hold it and will become like the life of you.

Please display the guidepost to a solution.