Any thoughts as to what may be going on? I run a PMS on an iMac that is on OS X 10.11.5 (and won't be going to 10.12 due to it's age) and have had very few problems over the years. Since this update? Apple TV app can't find it, my iPhone can't find it, even the browser app can't find it. I have to then go to the iMac it is on, select "Update Library" and then go to apps.plex.tv and make sure I can log in.
I ran iOS all summer and there were never any issues, so the only thing new is the recent update to PMS. I can safely say it is not any changes on the iOS or OS X front as my iPad is still on iOS 9 and having the issues, and the Mac it is on has the issues as well (again, on OS X 10.11).
Thanks!