I've been wanting to try GTA 5 RP so I installed GTA 5 last night, made my account and got the server thing installed, but the game will just crash leaving a message saying "GTA 5 has exited unexpectedly" I tried in safe mode, and the same thing. I'm running everything as admin. I've allowed it through firewall, turned off my anti virus. The game runs absolutely fine in single player, and regular online.
One of these two options fixed my problem
A) Lowering GTA 5 setting and using DX 10 over DX 11
or
B) Reinstalled Rage Multiplayer client
