Mine is having issues scanning as well.
I have looked and found that it does not list or show agents anymore. I also cannot get to the server settings… it just states “server settings are unavailable” even when going to the local IP. I have read about disabling IPV6 but I cannot get into the settings to do that. Is there a file I can edit?
Also in the plex media scanner.log file I get this on the files recently added:
Mar 14, 2019 07:43:06.535 [0x7f7e81e22700] DEBUG - HTTP 404 response from GET http://127.0.0.1:32400/system/agents/update?mediaType=1&force=1&guid=local%3A%2F%2F7873&id=7873
