OSX Server Wiki getting errors

I had OSX Server working fine with a Wiki on my home network. After having to reset the network with problems from my cable provider I am now getting the following message when I try to access the server... Suggestions greatly appreciated:

Proxy Error

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /wiki.

Reason: Error reading from remote server

I am running High Sierra 10.13.2 on my machines and OSX Server version Version 5.4 (17S1207). My Website and Wiki status in the Settings show on and Green.