Issue for the streaming switch option

I got an issue about the live stream switch option. when i select the switch option for my two camera inputs using switcher the error message would be shown. That is ( Server returned 5XX server Er…) What is that mean by? guys please help me out.

Hmm, this is the switcher interface on the Epiphan Live dashboard? Are you just accessing this from a computer on the same subnet, or is this across subnets, accessing externally (wan forwarded ports, vpn, etc) or through AVStudio?