Difficulty in getting Allmon3 to talk to node

I’m running the latest versions of Allstar and Allmon. My node is registering without any problems. When I try to connect Allmon3 to this node, I get the message, “Allmon3 is not responding to requests for this node. Check server logs.” Where will I find the server logs? Any thoughts on what could be causing this problem?
Thanks,
Dave, WA6IFI

That error means either allmon3 isn’t configured correctly or there’s a webserver error. Look at journalctl -xeu allmon3.service as a starting point.