Launch Ubisoft Connect once while online and sign in
Enable Remember me in Ubisoft Connect
Open Ubisoft Connect settings
Turn off Start Ubisoft Connect in offline mode if enabled
Verify Far Cry 6 is fully installed and updated
Launch the game from Ubisoft Connect, not from a shortcut
Disconnect the internet after Ubisoft Connect is fully open
If prompted, choose Go Offline or Work Offline
Close Ubisoft Connect completely
Reopen Ubisoft Connect and select Offline Mode
Check that Ubisoft Connect is not stuck in offline mode from a failed login
Clear Ubisoft Connect cache
Delete the contents of the Ubisoft Connect cache folder
Restart the PC
Run Ubisoft Connect as administrator
Allow Ubisoft Connect and Far Cry 6 through firewall and antivirus
Make sure Windows date and time are correct
Sign out of Ubisoft Connect and sign back in while online
Reinstall Ubisoft Connect if offline mode still fails
Reinstall Far Cry 6 if the game files are corrupted
Avoid using VPN or proxy when switching to offline mode
Ensure the Ubisoft account has previously launched Far Cry 6 online at least once