Windows 10 App - A Server Error Occurred During Sync



I've used Plex for a few years, and have had an odd sync issue or two, but never something like this.

I recently rebuilt my computer, and reinstalled Plex fresh. At the same time, I got a new Surface. Though my other (Android) clients can sync to the Plex server just fine, the Windows 10 app will not sync due to "A Server Error Occurred During Sync"

The Plex server log looks normal, but I get an error on the client log (the only thing I have changed is replace my actual ip with "internalip" or "externalip"

017-12-30 17:42:40:1320 [22] DEBUG - [SyncListManager] - Asking server Michael to refresh sync lists
2017-12-30 17:42:40:1481 [22] DEBUG - [PlexHttpClient] - PUT
2017-12-30 17:42:40:1706 [22] INFO - [SyncListManager] - Downloaded 3 sync item(s)
2017-12-30 17:42:40:1706 [22] DEBUG - [SyncOperation] - Finished refreshing sync list: 3 sync item(s)
2017-12-30 17:42:40:1757 [22] VERBOSE - [SyncOperation] - Run: Refreshed sync list in 0:00:20.4161005
2017-12-30 17:42:40:1757 [22] DEBUG - [SyncOperation] - Initializing server list
2017-12-30 17:42:40:1757 [22] VERBOSE - [PlexServer] - Testing 2 connections out of 2 for Michael
2017-12-30 17:42:40:1817 [10] DEBUG - [PlexHttpClient] - GET
2017-12-30 17:42:40:2006 [22] DEBUG - [PlexHttpClient] - Received OK from
2017-12-30 17:42:40:2016 [10] VERBOSE - [PlexClient] - Container from has 0 child item(s)
2017-12-30 17:42:40:2276 [5] DEBUG - [PlexConnection] - Last successful communication to happened at 12/30/2017 17:42:40, not retesting (connection is already the active one for device)
2017-12-30 17:42:40:2419 [10] DEBUG - [PlexConnection] - Testing connection to with a timeout of 00:00:20
2017-12-30 17:42:40:2429 [10] DEBUG - [PlexHttpClient] - GET
2017-12-30 17:42:40:2473 [5] DEBUG - [PlexDevice.TryTestConnectionAsync] - Comparing Michael connections with preferLocal=True: (Available) vs (Available) = 0
2017-12-30 17:42:40:8040 [18] DEBUG - [PlexHttpClient] - Received OK from
2017-12-30 17:42:41:2700 [22] WARNING - [PlexHttpClient] - (HttpRequestException->Exception) from The text associated with this error code could not be found.

A connection with the server could not be established


Any ideas?


I’m getting the same issue, any ideas?


Any ideas?


Same issue here and called out in the regular forums, is this the error you get? :

Windows 10 sync seems to be broken after the last update.


Same with Sync for me, however I’m still on Window Phone 8.1.
When I try to edit a sync item that says that has an error related (only since about PMS version 1.9), saving the changes it says “Unable to save sync item - Expected X-Plex-Sync-Version:2”. The item is Music, if that’s any relevance.


same errors here, fresh install on Win 10, synched 2 tv episodes at original quality, one large 2GB+ one small 170MB
3rd file failed “Server error”, subsequently nothing will sync with the same “Unable to save sync item - Expected X-Plex-Sync-Version:2” error


Likewise. Anyone from the Plex side want to comment?


Can anyone sync with the Windows 10 client?


Not any more.


Still broken for me


Broken for me also…


Here also broken… tried it on 2 different pc’s … ipad works fine!


Still broken here as well.


well this sucks I just sat down to sync some movies for a family vacation… guess I’m manually copying them


Right so I figured out a workaround for syncing, I think. Once you allow syncing to the device by adding a single sync item. You can them use the plex web interface to sync to your device. I did notice however that the updated windows media player doesn’t like aac-lc… so I need to find a workaround for that as the profile doesn’t make a difference…


Plex just needs to fix this. Kind of ridiculous if you ask me.


I agree but what can you do if there seems to be no developer (likely because of some miscommunication due to the EOL of Windows Phone). Ideally they would open up the code for the UWP app so some of us could dive in and fix it ourselves. (I don’t feel like re-writing the whole thing from the ground up…)


Broken for me too. I can’t believe this has been broken for so long.


Does Plex not support the Windows app anymore?