Plex service is not working in Sonos-app
I have a problem with my Plex service running in the Sonos app. When i open the Plex service in the Sonos app, all the albumcovers on my Plex server are not shown. When i try to play a song it says: unable to play song, cannot connect to plex. According to the Plex app in Windows, my server is accessible from the outside. (green check) herefore I forwarded port 32400 in my router. UPNP is sett of. If i turn UPNP on, i doesn't change anything in Sonos. How can i get Plex working on Sonos? I hope someone can help me with this issue.