Can't find server after upgrading server

Just upgraded server installed on Mac OS Sierra and now my server is not being recognized. “Looking for server…” just keeps spinning. I can’t find any instructions on what do to in this situation. Do I download and re-install server software again? Will I have to re-configure from scratch in that case? I certainly hope not.

I went ahead and re-installed Plex Server and it seems to have righted itself. My existing server configuration was retained.

Logging out of the web interface and logging back in may also have saved some time.