If none of the above work, your game data is likely corrupted by conflicting scripts.
The most common reason Four-Play fails is an incorrect F4SE installation. Four-Play relies entirely on F4SE to inject scripts into the game. ll fourplay f4se plugin fix
Check File Structure:
Launch Method:
F4se relies on Visual C++ 2012 (x86), even on a 64-bit system. Modern Windows updates sometimes remove older versions. If none of the above work, your game