I have source compiled build of ue4.23.1 with chaos demo. It keeps crashing silently at 79%.
yes … I’m not alone 
hope somebody has a idea. I guess with launcher build it will work - but with the gitversion I also get an assertion fail (run in debug mode from visual studio to see where it breaks)
I managed to do bit more but no success.
Check this thread How to enable Chaos - Announcements - Unreal Engine Forums