So I tried to delete everything to the bare minimum, but it doesn't start for me.
I uploaded the project files...maybe you guys can find the cause of the problem.
https://drive.google.com/file/d/1TRn6uDXDB7F47GPWDpaml-QqNp-bFGme/view?usp=shari...
Okay, I passed it through debugger and there aare a few tiles and textures you set but then deleted.
I'm not sure why this happens as I've been adding checks here and there but this is the problem:
The engine tries to load tiles and textures that just don't exist anymore. Try adding some textures and a few custom tiles and see where they appear on the map. Then remove them.