(I've seen the requirements for reporting bugs but im unable to brake down the program to its simplest form.)
My game was working fine until one day I tried previewing it in the browers and I saw "assertion Failure: Project model unavailable"
Current Version r252 (I was on the most recent version but i downgraded to see if it was a release issue)
The bug is present in all browsers .
Steps to reproduce bug : Try to preview the game
I'm running windows 10