The notification server certificate expired, the exchange was made on the server but when viewing the Console URL, there is an HTTPS error as IIS still references the old certificate. This is seen by viewing the Certificate.
This issue may be caused by setting a Host name in IIS Bindings for port 443. A Host name is not necessary.
Run netsh http show sslcert to view the Certificates registered to this Server. Find the old Certificate and make a note if it is showing as IP:Port or Hostname:port.
To delete the 'old' reference to the certificate and run one of the following commands, depending on what is showing in the netsh command:
netsh http delete sslcert hostnameport=Hostname.Domain:443
netsh http delete sslcert ipport=18.104.22.168:443
Refresh the Console and it should load with out error.