Plex no longer working on Xbox. HELP!

Everything was working for a long time. As of 2 -3 weeks ago I can’t connect to a 3rd party PMS.
It constantly tries to connect but just says “This server is offline or unreachable”. Also important to mention
that I have no issues connecting to the server on my laptop. It all works fine. So the only problem is on the Xbox One.
I have it set to ALWAYS on un-secure connections. I uninstalled and reinstalled the app on Xbox. The 3rd party removed and re-invited me to share his server. Nothing is working Any help would be great.

PLEASE DELETE. I made a username like it requested and it showed up on my xbox but clearly
it used my email for this post. Unbelievable

Hiya. Does the person you’re sharing with have the server to require secure connections?