Current questions and answers regarding the map editor.

Zenja, it seems like your path is too long. Try removing some characters from the map name or (better) shortening the name of the folder where the game is located. However, if the map opened normally before, then this is some other problem.

Guys, please help. I've been working on a map for a week, and suddenly, for no reason, the file is corrupted, and this has happened more than once. I have Steam and GOG licenses. This problem occurs on both. Is it possible to open it?

If it's corrupted, then most likely it can't be opened, although I don't know the reason. I can only recommend that you make backups more often.