A majority of errors in the HCS-411 are handshake or authentication failure of some sort with the hardware controller systems and Git hosted backend applications.
To fix it, review your network gateway login, check the API endpoint access or Git repository access tokens that you've created are not expired, and restart the host controller service. Generally, if it is a timeout or the port configuration is incorrect, both the fault subsystem log and the configuration of the socket/time limits can provide the information.