If you are playing version 3.3.6, ensure you find a trainer specifically built for that version or the current v3.3.7. For the safest experience, use the WeMod application, as it automatically detects the game version and applies the correct cheats for Single Player mode.
Launch Mental Omega and look at the Main Menu screen. Ensure it explicitly says . If you have updated via the client recently, you might actually be on v3.3.7 (released mid-2024), in which case a 3.3.6 trainer may not function. mental omega trainer 336