An other possible reason:
I get this message if I edit an Python/XML file of BTS, which is also included in the used mod.
The wrong checksum for the base game triggers the popup, but the mod-related checksums are fine.
I get this message if I edit an Python/XML file of BTS, which is also included in the used mod.
The wrong checksum for the base game triggers the popup, but the mod-related checksums are fine.