.dev

I've managed to fix the issue after quite a bit of testing.

For any of you who may come across this in the future what I did was:
TLDR; A September 2025 Windows Update caused Program Files to become a protected environment which restricts read/write access of any third party program (RagePluginHook). If you are having to approve any files that move into your GTA folder, this could be the fix for you. Simply fix this specific issue by moving your game installation to another folder, preferably directly into C: Drive (C:\Grand Theft Auto V Legacy) and see if this could fix your issue.

ELS + AdvancedHookV was failing during early initialization because it could not reliably write files / initialize hooks under Program Files’ protected environment. Turning off your antivirus will NOT fix this, because your PC still has a layer of security when it comes to your permissions. If you find yourself constantly having to approve file transfers to and from GTA 5's root with Admin Permissions, try moving your installation to your C:Drive or wherever else. Program Files may have a hard time allowing reading/writing permissions, and I noticed that AdvancedHookV was having a really hard time working because of where the installation location is. ELS.asi wasn't broken, my PC permissions are just all messed up. Definitely move your game installation somewhere else on your PC and give it a try. Rockstar Launcher naturally installs the game in C:/Program Files/Rockstar Games/"GAME", but that can be very iffy.
Doing this will ALSO fix any sudden crashes with RPH when it tries to hook. It's basically the same concept. Program Files will not allow RPH permissions to read/write since program files is a protected environment. All of my crashes stopped as soon as I moved my game folder.

GTA 5 updated, you'll have to wait until a newer version of Scripthook V is released.
You're suggested to back up your game files and play on the older version. Otherwise, it's a waiting game.