"Unable to play video" on new Plex Server

Server Version#: 1.18.6.2350
Player Version#: Fire TV

Hi. I have recently added a new server (WD My Cloud Home). I already have 2 other servers running perfectly fine (Again, both are WD My Cloud Home machines) that play and work with no issues.

After installing my 3rd server, videos played fine, then all of a sudden, wouldn’t. Now, all I get is “Unable to play video” it doesn’t matter if its an 800mb 720p file, or a 5gb 4K file. nothing works. The funny thing is, if I upload the same file to one of the other servers, it works fine? I have tried everything I can think of, but nothing seems to work… Please help me before I go crazy lol!!!

All servers are on my local network, and all show up on my Plex dashboard. All settings are the same as the other 2 servers.

There is a problem with current versions of Android/Android TV apps and older versions of Plex Media Server. The Android apps are rejecting the security certificate from the server.

Users running Plex Media Server versions 1.18.x and 1.19.x are definitely affected. The problem may happen with other Plex Media Server versions (I don’t have a list of all affected releases).

The problem is visible in the Android client log: [FFmpeg] [ERROR] [tls @ 0xc35efba0] Peer certificate failed verification

Updating Plex Media Server to a current release fixes the problem.

If you cannot update Plex Media Server, such as some running Plex on WD & Netgear NAS, the workaround is to disable secure connections.

Plex Media Server: Settings → Network → Secure Connections = Disabled.

Android app: Settings → Advanced → Allow Insecure Connections = Always

Note: You will lose Plex Web access via app.plex.tv, which uses https, when you make this change. You will have to connect to your Plex server via http://nas_ip_address:32400/web (ex: http://192.168.1.2:32400/web ).

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