Tower of Fantasy: Fix Error 7812021


Tower of Fantasy is an open-world MMORPG based on an anime and sci-fi adventure theme. It is developed by Hotta Studio and published by Level Infinite for PC, Android, as well as iOS. Here is an article that solves the error 7812021 for Tower of Fantasy.

Check Minimum Requirements

Here are the minimum requirements for Tower of Fantasy.

Windows Minimum Requirements

  • Requires a 64-bit processor and operating system
  • OS: Windows 7 SP1 64-bit
  • Processor: Intel Core i5 or equivalent
  • Memory: 8 GB RAM
  • Graphics: NVIDIA GeForce GT 1030
  • DirectX: Version 11
  • Network: Broadband Internet connection
  • Storage: 25 GB available space

Android Minimum Requirements

  • Compatible Versions: Android 7.0 or above
  • RAM: 4GB or more

iOS Minimum Requirements

  • Compatible Versions: iOS 12.0 or higher, iPhone 8 Plus or higher
  • RAM: 4GB or more

Check Installation and Repair the Game

You can repair the game by clicking on the “Start Repair” button, appearing on the error screen. If unsuccessful, try reinstalling the game. Also, make sure to disable your antivirus before clicking on Start Repair.

Add QRSL.exe and tof_launcher.exe Into DirectX Properties

These files will definitely fix the 7812021 error. Here are the steps toward adding these files.

  1. Tap on Windows Key + I 
  2. After that Click on Apps
  3. Tap on Optional Features
  4. Find Graphics Tool and If not installed, then first install this by clicking on add a feature.
  5. Now exit the Window.
  6. Again Tap on Windows Key + R
  7. Type dxcpl and tap on Ok and again click on OK
  8. Now, Tap on Edit list
  9. Search and find the files QRSL.exe and tof_launcher.exe and tap on OK
  10. Under DirectX Properties Window, ensure Direct3D/DXGI Debug Layer is set to Force On.
  11. Come down for Device Settings, and set the Feature level limit to 11_1. 
  12. Also, check the box that says Disable Feature Level Upgrade.
  13. Finally, Tap on Apply and OK to save all changes.

Make sure to restart your PC after this procedure. This will most probably fix the issue. Subscribe to our newsletter to keep yourself updated with topics related to gaming, tech, and more.

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