Error Communicating with Plex Server on Xbox One

Plex has just stopped working suddenly via the Xbox One app since yesterday. I am able to log in on other devices no problem and have perfect playback.

I tried logging out and back in of both the Xbox One app and Plex on my Mac too. I’ve restarted both several times aswell.

I see in another topic at else one other person is having the same issue but he seems to think it’s to do with his AntiVirus software. This isn’t applicable to me. Anyone have any solutions?