Authentication failed with Voximplant

After many attempts to have a dial in through Voximplant, I cannot get jitsi to pick up a dial in call. I have the following error in /var/log/prosody/prosody.log

Oct 11 00:00:03 jcp55b5d90f65d0 info Incoming Jabber component connection
Oct 11 00:00:03 info Component authentication failed for callcontrol.jitsi.physical-trut>
Oct 11 00:00:03 mod_component info Disconnecting component, stream:error is: stream:error<not-authorized xmlns='urn:ietf:params:xm>
Oct 11 00:00:03 jcp55b5d90f65d0 info component disconnected: (false)

prosody.err gives:
Oct 11 03:15:37 portmanager error Error binding encrypted port for https: No certificate present in SSL/TLS configuration for https port 5281

I have contacted Voximplant to ensure my reinstall is ok at their end. Can anyone see where I may be going wrong?