After upgrading to version 9.15.2 of the PMS I can no longer access the media library from any other computer on my LAN (over Ethernet and WiFi). All I get are time-outs inside the browser when entering the URL to my local PMS. I also have an Apple TV, which also no longer finds the Plex server (a Mac Mini) through the Plex app (for tvOS). I can, however, access my library on the computer running the PMS (through 127.0.0.1)
After going back to release 9.14.6 everything is working fine again. I don't believe it is related to any firewall configuration, but if you have any idea what might be going on, please let me know.
I am running PMS on a Mac Mini (Late 2014) under El Capitan 10.11.3