Xbox one client unable to connect plex server

When i start the xbox app, it loads and after 30s it says it cannot access the server.
I can see from the server devices list that it has connected (like 1min ago)
If i open plex server url from the Microsoft Edge in the xbox one, it works fine.

I have :

  • reinstalled plex app in xbox
  • reinstalled plex server
  • optimized DB
  • removed and added libraries
  • disabled server firewall

Server is running in Windows 10, with two network adapters. One for Internet access and one for LAN access.
Web, iphone and ipad apps are working fine.

Can you maybe set “Allow insecure connections” to always in the Xbox app?

Maybe this helps.