C:S crash when saving a city

Hello I am on POP-os 22.04. I have the latest mono-runtime and mono-devel installed but city-skylines crashes when attempting to save the game, even if I haven't used the mod but it is active.

I love this mode and spent some time today fixing some of my junctions. I hope someone can find a fix fotlr this so I can use it in my citys. 