@gwynatnudd Steam? Hell no. I had GTA V on Steam long ago but deleted it and haven't used my Steam account since.

It happens sometimes with corrupted dlc or xmls. Remove the faulty mod. It wont work properly. I have tried with a few addon cars or others. Always backup your latest working game. And only install 1 mod at a time. Several mods installed at the same time can also be a bottleneck.

Looks like it got taken down after I complained to the Site owner

@HeySlickThatsMe You sir just made my week, thanks very much! I had the files backed up just didn't know where to start looking. I still have the atmosphere OIV package from the mod. Cheers!

@GurMan

I dragged 2 files into the GTAV folder and it still showed the error

Both, hands can be offset inside the weapon model by moving the bone and disabling it's movement flags, although it doesn't let you position hands so it would look like you're using a vertical grip, the only way to do that would be to edit animations

I don't think ENB is working with GTA V anymore...