I can confirm, normal custom scripts line works aka JASS and GUI works as intented.
Unfortunately vJASS is broken, can’t use any libraries or so with the current patch.
I can’t believe you actually managed to break your own code.
EDIT: As of around 17.12/18.12 the vJass works, testmap feature works (no crash) and jasshelper is fixed. Good job Blizzard dev team! 
Also confirming. None of my maps utilizing damage engine work anymore. RIP
Another confirm here,heaps of Compile errors in the map i am working on
Confirmed, can’t test maps anymore.
Are we waiting 3 months for a change or has someone from blizzard aware of this?
Sadly at the moment there is zero information about a hotfix or revert. Guess we just have to wait. 
@Middis
From your edit it seems yours is working?
What have you done differently?
Nothing really. It just had multipe small patches which I downloaded.