I also had issues with the FOV script. Instead, I created a trainer for myself using Cheat Engine that overwrites FOV when it is modified in-game. It sets FOV to 15 whenever it is active.
Google Drive Download:
https://drive.google.com/open?id=0B66iNbttZf_9bDNRNjFDcEFHZDQ(I forgot to add an icon. Sorry about that.)
If this works let me know so I can possibly create another trainer that includes more FOV values.
Instructions:(I only have to follow these steps now)
1. Start RE7_Trainer.EXE.
2. Start Resident Evil 7.
3. Press F1 at the main menu.
If that didn't work use these steps just to make sure: (These are the steps I took to "debug" the trainer. They still work.)
1. Start RE7_Trainer.EXE.
2. Start Resident Evil 7.
3. Go to a playable portion of the game and press F1
4. Change FOV to anything.
If you want to create your own, follow my first post on page 4 to get your FOV variable address. Then follow Mr GoldGiver's Channel's tutorial(bottom credits) to create a trainer that modifies the FOV value.
Credit:
Mr GoldGiver's Channel Tutorial:
https://www.youtube.com/watch?v=vl6Qv1n5G7UI followed Part 1 and 2 of his tutorial. Worked perfectly.