When I start FiveM it says an error like this:
GTA V folder screenshot https://imgur.com/a/qDDmq
GTA V/update/x64/dlcpacks screenshot https://imgur.com/a/8vB9m
Filepath to FiveM folder C:\Users\admin\AppData\Local\FiveM
FiveM client folder screenshot https://imgur.com/a/TvRfd
Did you try to disable/uninstall your Anti-virus? No Antivirus.
I also tried to reinstall GTA V
Singleplayer works Fine