You should see a success message.

If you see , apply Solution 1 or 2. For "Script 'Main' line 30: TypeError" , focus on Solution 3 (registry and compatibility). Conclusion: Finally Banish the Oni’s Technical Curse The Ao Oni 30 fix is a rite of passage for classic horror fans. It’s a small technical hurdle that stands between you and one of the most influential indie horror games ever made. By installing the correct RTP, editing your Game.ini , or tweaking Windows compatibility, you can resurrect the purple demon on your modern PC.

After installation, restart your computer. This ensures all registry keys are loaded. Then, launch Ao Oni.exe again. The error should be gone.

By blanking the RTP line, you force the game to look for assets inside its own directory first. This bypasses the system-wide RTP check entirely. This is a modern Ao Oni 30 fix for USB drives or cloud gaming. Solution 3: Compatibility & Registry Tweak (For Stubborn Errors) Sometimes the RTP is installed, but Windows 10/11 blocks it. Use this surgical fix.