GTA V version? Most recent - I had to download it again from Steam Yesterday
Up to date? Yes
Legit or Pirate copy? Legit
Steam/CD/Social Club? steam - klsims2015
Windows version? 8.1
Did you try to delete caches.xml and try again? No caches exist Five M was uninstalled yesterday
Error screenshot (if any) 
System specifications Republic of Gamers Latop (GS750JS) Nvidia 870
What did you do to get this issue? I receieved an error that I couldnt load into any server yesterday because I was missing a fivem core file. So I uninstalled to reinstall.
What server did you get this issue on? LEO Server
CitizenFX.log file ??
.dmp files/report IDs ??
If an issue with starting:
GTA V folder screenshot
GTA V/update/x64/dlcpacks screenshot
Filepath to FiveM folder
FiveM client folder screenshot
Did you try to disable/uninstall your Anti-virus?
Also add what you already tried so far.
Uninstalled FiveM after giving me issues even loading into any server. Tried to reinstall and got the error that I am talking about now. I then uninstalled GTA V and reinstalled it, still getting the same error.