Before you give up, here is a summary of the fixes to try in order:
Edit the .ini config file in Documents/Lula3D to match native monitor resolution "Insert Disc" error (Digital copies) Run the executable strictly as an Administrator If you want to fine-tune the game further, let me know:
The original SafeDisc DRM used by the game is disabled by default on Windows 10/11. Using a digital version (like those from GOG.com ) often bypasses these legacy copy-protection issues entirely.