Its not a fix, but I managed to start the game WHILE the error message popup was displayed.
Step by step:
1. Start BlueSunMod.exe.
2. Hla.dll error message is displayed with kirilica(?) symbols, which are mangled into unreadable mess due to different system locale.
3. WHILE the error is still visible - start the game with BlueSunMod.exe AGAIN. Managed to get to the weird looking hooker, didn't go further yet
Strange error though, might be that the hla stuff failed to initialize, so there SHOULD be problems ahead