Lost Connection to Plex Server

I run a DLNA enabled Plex server on a QNAP NAS device. When I first installed Infuse on my ATV4, I could see my Plex server and and created several shares to it. About two weeks ago, Infuse lost its connection to Plex and it is no longer visible. Everything form the Plex side seems OK, though. It’s reporting that its online and digging through the logs shows no errors of any kind. I am at a loss of how to troubleshoot further. Anyone have any troubleshooting tips they can share?