When working on my region this some weird stuff happened like yellow text from devtools not disappearing, the screen froze and i couldnt end the round after dying.
#Mysterious crash that suddenly appeared while i was going through my rooms
serene field
serene field
looks like it's an issue with the devtools map since the exception log continues only when im in that page
river knoll
it crashed again
I don't know a lot about this game or how it ticks, and by no means should I be taken as fact but it looks like the same error of something out of a parameter or an index being invalid? IDK 
serene field
lol
wooden ocean
@serene field the specific issue that's happening here is that the room file says it has less visible tiles than it actually does
any tile that isn't solid is considered fully visible before baking the room, and so when exporting the room geo from the level editor it writes the visibility array to be as long as the nonsolid tiles
I've encountered this issue when writing a mod that removes solid tiles from a room with placed objects, though I'm not sure why you'd run into this issue without a similar code-related change or a manual modification to the room txt file
...at least that's the first error that you posted
the 2nd one appears to be completely unrelated probably? something's breaking in the devtools ui, which is a really vague error that's hard to figure out