Current version scripthookv and Rage plugin hook are not matched to build 877 game version.
So, I think that of course you are using script mods, that is cause you can't start current version GTA V.
That is same me.
I try following act, success to start GTA V steam version.
1:Uninstall all Plugins (include scripthookv and Rage plugin).
That is better keep backup setting.ini of plugins and mod folder (GTAV directory).
2:Verify cache.
3:(If you Can't recovery) reinstall game.
Now, I can play GTA V but it's a just GTA V, not cop.
We have to wait until scripthookv and Rage plugin hook will be updated.