The map stopped launching in the map editor. (Again.)

The issue is as follows: a ready-made map stopped launching after some changes (there were no scripts on the map, except for the seer's hut). The name and path to the map do not contain Cyrillic characters, and removing spaces from the name also did not help. The map size is 500MB. Reinstalling the game and shortening the path to the folder did not help either. The error when launching the map is: "Cant load" followed by the path to the map. I tried deleting files from the archive/map, but the archive is read-only. Files can be extracted from the archive, which means the map file is likely not corrupted. Please help!