I am noticing a lot of people who are confused about how to play the game using their favorite mods during these stormy days so ill chip in my fix for the issue.
Just follow these steps and i'm sure you will be up in no time, until Scripthook is updated and by then we can safely upgrade.
*I'm pretty sure its against the rules to upload files in here so i wont. a quick google search will get you the versions you need.
No Launcher Method:
1. Downgrade GTAV to 1032.
2. Downgrade RPH to 0.52
3. Find "GameBackups.rph" in the root folder and rename it to Something else so RPH won't find it.
4. Don't let RPH backup the current version, there's no need, just skip the request.
5. Download this
6. Launch "No GTAV Launcher" and immediately after, launch RPH as admin and click on "Continue without updating", it will automatically hook up to the current game window.
Original Launcher Method:
Follow steps 1-3.
4. Disconnect your network.
5. Launch RPH as admin and don't let it backup the current version, there's no need, just skip the request.
6. click on "Offline Mode" in the Social Club window that pops up.
That's pretty much it, it works perfectly for me and using the latest Scripthook.
Good luck.