You need to update your server software version. Plex Media Server - Security Update - #3 by PlexInfo
- Ensure that your container is set to use “host network”.
- Remove or disable any browser add-ins which manipulate web pages and DNS records.
- Tell your browser that the website app.plex.tv shall have access to the local network
- tell your web browser that any website ending with
.plex.tvshall have the right to store cookies in your browser - Ensure that your network doesn’t have an issue with DNS rebinding protection. https://support.plex.tv/articles/206225077-how-to-use-secure-server-connections/