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Did something weird happen with the last Underground Station you built?
Do you have any news ones that you did not build station entrances for?
I had this happen before long ago. iirc, I ended up bulldozing the problematic station and rebuilding it; only this time I built the entrance and staircases immediately instead of letting it stay without them for too long. Please try to see if that helps you!
That is very strange. When I review the stdout, this line seems to be the crash point: "
urban_games/train_fever/src/Lib/UI/Core.cpp:2536: void __cdecl UI::CCore::AddId(class UI::ILayoutItem *): Assertion `pr.second && "Duplicate id found."' failed."
This "Duplicate id Found" is a problem that is probably causing the crash. This appears to have been discussed 3-4 years ago and they resolved the issue.
I´ve tried it, but same Problem. I placed a staion and the game freezed.
If the original link I sent didn't have the solution, then the next step would be to refer to this Lexikon entry as it mentions this exact error.
You don't have this Mod double subscribed on Steam AND Mod.io do you?
No, I haven´t double subscribed it 
Thank goodness this didn't occur when you were deeper in the designing phase. There must have been a unexplained issue that developed in your save. Happy to hear it is resolved!
