Part of the issue is that your game is heavily modded. IMHO, you'd need to reset to vanilla (assuming you've backups of that and of the modded so that you can easily switch back and forth). go to vanilla and try each mod by itself one at a time to see if the error happens again. After that try them in stages, such as start with mod1 and add mod 2 and then test the game. if error free, add mod 3, test. rinse and repeat until you've isolated the source. It's extremely tedious and time-consuming BUT it will help you narrow down a possible cause as it could be a mod conflict, or even a mismatched folder somewhere.