Hello,
I had the same problem. Starting GTA without RPH, but Script-Hook and trainer was fine. But when starting it with RPH, game crashed. After I started it without loading any mods on startup - no crash. So I loaded the mods one by one - and, at least for me, my game crashed when loading EUP menu. Disabled it - loading with all mods on startup is fine now.
Version
RPH: RAGE Plugin Hook v0.64.1234.15464 PUBLIC ALPHA
EUP Menu: 2_2_0_2
Only using Law & Order, but replaced it with GUP 2.3