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What could be the problem? Please advise.

After reinstalling to version 3.0, everything works normally. But 3.1 is the latest version, and it also removes the need for the disc, which is good because it's already quite worn out. Has anyone encountered a similar problem, or does anyone know a solution? Please help.
Doctormalar, your maps are not being saved correctly. This usually happens when there are Cyrillic characters in the file path, but in your case, that doesn't seem to be the issue... I've seen that a similar problem can occur due to an excessively long file path. Try renaming the folders so that their names have fewer characters.
kizan666 It might also be due to the video card drivers. Try downloading the latest ones from the developer's website and installing them.
Added 2 hours 1 minute ago
Updating the drivers didn't help. I'd even say that, combined with compatibility mode, it got worse: before, the menu was visible, but now it's just a black screen with music playing in the background.
Added 1 minute ago
I'll try installing just Heroes 5.
Added 7 minutes ago
The regular version of Heroes runs perfectly fine. No glitches at all... I'm puzzled. Aren't the system requirements the same for these games?
Added 20 minutes ago
By the way, during installation, both the first and second time (I reinstalled the game), it gives an error at 89%: The following error occurred in the file: D:[Games]\Nival Interactive\Heroes of Might and Magic V - Tribes of the East\Editor\IconCache\AdvMapObjectLink\MapObjects\_(AdvMapObjectLink)\Objects-All-Terra\FestiveMission\PanzerKlein_Model.(AdvMapObjectLink). The system cannot find the path specified. (0x3) Is the disc scratched? :mad: P.S. Maybe someone can send me this file? kizan666@mail.ru