I just recenlty ran into this issue although I did not do any upgrades on PMS, PlexConnect or ATV. I did try to update my plexconnect to see if this resolved the issue but it did not here is my below information as per the https://github.com/iBaa/PlexConnect/wiki/How-to-report-an-issue
Apple TV 3 software version 5.2.1
DNS Server set to 192.168.1.4
Device and OS PlexConnect is Installed on: PC Windows 7 Ultimate 64 Bit SP1
Local IP Address of device that PlexConnect is installed on: 192.168.1.4
Device and OS Plex Media Server is Installed on: PC Windows 7 Ultimate 64 Bit SP1
Plex Media Server Version: 0.9.7.28
The Local IP Address of the Device that Plex Media Server is Installed on : 192.168.1.4
PlexConnect Version Number : Downloaded from get hub on 8/30/2013
Apple changed the way Trailers.app communicates, adding a secure https. There is now a fix that was developed in the following thread and is spelled out in the tutorial.
I just recenlty ran into this issue although I did not do any upgrades on PMS, PlexConnect or ATV. I did try to update my plexconnect to see if this resolved the issue but it did not here is my below information as per the https://github.com/iBaa/PlexConnect/wiki/How-to-report-an-issue
Apple TV 3 software version 5.2.1
DNS Server set to 192.168.1.4
Device and OS PlexConnect is Installed on: PC Windows 7 Ultimate 64 Bit SP1
Local IP Address of device that PlexConnect is installed on: 192.168.1.4
Device and OS Plex Media Server is Installed on: PC Windows 7 Ultimate 64 Bit SP1
Plex Media Server Version: 0.9.7.28
The Local IP Address of the Device that Plex Media Server is Installed on : 192.168.1.4
PlexConnect Version Number : Downloaded from get hub on 8/30/2013
Dont people know how to search before posting, good grief...
i did search actually but I kept seeing that it was "After Apple Update" so I assumed that it was after updating their Apply TVs My bad on the assumption. But definitely thank you for the help in pointing me in the right direction.