My iPad does not view the video files sorry. What OS are you running? And how much memory do you have? My first guess is it is running out of memory maybe? The fact that it starts up indicates the code basically works (so everything is installed).
I do vaguely remember some previous talk on Windows about NDVIA driver versions for the graphics card - there was a version of the drivers that caused problems. Updating the graphics card drivers fixed the problem (NDVIA released a new version of the drivers with a fix).... ah, here might have been the thread https://community.adobe.com/t5/character-animator/crash-to-desktop-when-entering-rig-2-0-1-build-8-p.... If you search for NDVIA, graphics, drivers, terms like that there might be some other threads with instructures how to fix as well. Anyone who updated drivers around that time got bitten.