A corrupted cache is the #1 cause of this error for legit users.

Before fixing the problem, you need to understand the mechanism.

If you are stuck on the loading screen or seeing this pop-up, follow these steps to get back into Los Santos. Check Your Internet Connection

This will remove your Social Club login details, but not your saves.

as an Admin and run these commands one by one, followed by a restart: ipconfig /flushdns netsh winsock reset Verify Game Integrity