I tried to roll back to the previous version, but the problem remains.
The web browsers just spins and never connects. Plex app for windows does work.
Here is a log excerpt:
Nov 12, 2016 16:44:13.771 [0x7fe91f526700] INFO - Plex Media Server v1.2.6.2975-9394c87 - ubuntu PC x86_64 - build: linux-ubuntu-x86_64 ubuntu - GMT -05:00
Nov 12, 2016 16:44:13.771 [0x7fe91f526700] INFO - Linux version: 4.4.0-47-generic (#68-Ubuntu SMP Wed Oct 26 19:39:52 UTC 2016), language: en-US
Nov 12, 2016 16:44:13.771 [0x7fe91f526700] INFO - Processor Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
Nov 12, 2016 16:44:13.771 [0x7fe91f526700] INFO - /usr/lib/plexmediaserver/Plex Media Server
Nov 12, 2016 16:44:13.851 [0x7fe91b7ff700] INFO - Successfully retrieved OCSP response
Nov 12, 2016 16:44:15.986 [0x7fe916ffd700] WARN - Sync: Couldn't get sync lists without subscription.
Nov 12, 2016 16:44:17.462 [0x7fe914fff700] ERROR - Network Service: Error in browser handle read: 125 (Operation canceled) socket=-1
Nov 12, 2016 16:44:17.562 [0x7fe914fff700] INFO - Network Service: Abandoning browse socket, it was closed.
Nov 12, 2016 16:44:19.742 [0x7fe918ffe700] INFO - LibraryUpdateManager path watching is disabled
Nov 12, 2016 16:44:35.751 [0x7fe91dfff700] WARN - NAT: PMP, timed out waiting for response.
Nov 12, 2016 16:44:58.238 [0x7fe90cfff700] WARN - NAT: PMP, timed out waiting for response.
Nov 12, 2016 16:45:13.622 [0x7fe90cfff700] WARN - Unable to load episode file [seasons/1/episodes/28.xml]