I’ve been unable to get the new Plex Windows Player to work on my desktop nor laptop. My laptop was a fresh install of Windows 10 as well.
In looking at the logs on my desktop, Plex seems to be stuck in some sort of loop trying to connect to my server. The old client and web clients work perfectly fine.
I see this error at the top, then the looping I note below:
Mar 29, 2021 19:31:05.093 [16124] INFO - [Controllers] [Player] Initialized mpv 0.32.0-UNKNOWN, ffmpeg 1.6-367b3d4c85-2
Mar 29, 2021 19:31:05.124 [16124] WARN - [Controllers] Invalid port given for the inspector server “0”. Examples of valid input: “12345” or “192.168.2.14:12345” (with the address of one of this host’s network interface).
It seems to be looping and trying to connect to a non-existent server at 127.0.0.1, but even when it finds the right external and internal plex.direct URL and says it’s established a “long poll” connection successfully, the app window never opens and it just sits in the loop, as the log file indicates below.
You can see the loop here: Plex Media Server Logs - Pastebin.com
I see this error at the top, then the looping I note below:
Those are okay logs. 
It seems to be looping and trying to connect to a non-existent server at 127.0.0.1,
We look for a PMS instance running on the same machine as the app using the 127.0.0.1 IP address.
the app window never opens and it just sits in the loop, as the log file indicates below.
Restart the app, let it sit alone for long enough to see that it’s not starting up correctly, then quit the app. Afterwards please include the full %LOCALAPPDATA%\Plex\Logs\Plex.log file.
@BigWheel may have some additional ideas.
Thanks for the reply. I have let it sit for several minutes, it just loops and loops and loops. The only way I can quit it is via Task Manager (I see the QT Window Manager process that is started too). If it helps, I do get the initial “there is a new upgrade available” prompt and am able to have it auto upgrade, it just never opens or gives me a taskbar icon.
Should I include the entire log here, or via pastebin? It grows very large very quickly.
If you don’t want to post logs here publicly. You can message it to any one of us by clicking on our username and choosing Message
Attaching logs in a DM/zip is great.
If it helps, I do get the initial “there is a new upgrade available” prompt and am able to have it auto upgrade, it just never opens or gives me a taskbar icon.
If you are repeatedly seeing that prompt then let’s delete the upgrade assets from the file system. Please quit the app then delete all files from within %LOCALAPPDATA%\Plex\cache\updates. Afterwards it may re-download if there is a newer version.
Hi Matt - clearing out that folder did the trick. There were 5 different version number folders, I deleted them and tried to re-open, and it fired up right away. Thanks!
