If your error code starts with a ‘
c’, then your IP address is being blocked by
Sentinel, our in-house anticheat system. Sentinel will now temporarily block specific connections when an account is
caught cheating on it. The duration of the IP block is automatically calculated by Sentinel—based on the amount of other accounts that are associated with the current and previous IPs, along with the punishments they have received. The durations of these IP blocks vary between minutes and months. You can check the thread about disallowed connections here:
https://www.cubecraft.net/threads/disallowed-and-invalid-connections.215578/