If an issue with starting:
GTA V folder screenshot https://gyazo.com/9684d8171b0a4a3f134b03347922be36
GTA V/update/x64/dlcpacks screenshot https://gyazo.com/afa9e6f836ca5c22199f0fbea5cd3bd6
Filepath to FiveM folder C:\Users\user\AppData\Local\FiveM
FiveM client folder screenshot https://gyazo.com/4cad01480c3632cbba1ef16d58b0df71
Did you try to disable/uninstall your Anti-virus? Yes
Also add what you already tried so far: Delete cache, re-install FiveM