Confirm that you are using the same Portico Account that accepted the server invitation. A different email or sign-in method can create or select a different account.
Use the normal password-recovery flow instead of asking the server owner to share or reset an owner credential. If multi-factor authentication is enabled, keep recovery codes available before replacing a device.
Check the device date and time. Secure sessions and signed connection documents can fail when the clock is far from the actual time.
If sign-in succeeds but the server is absent, the problem is membership or connection rather than the password. Follow Server not found.