[Montellese]

Feel free to download the latest version and give it a try.

Yes. That fixed it. I am no longer getting that error. Thanks

Great, thanks for the feedback.

I wanted to give Plex a shot but it seems that now one has to register to use the server. It wasn't like that when I last used Plex. Admittedly that was about five years ago.

AFAIK you can configure your Plex installation to work without internet but you still need a MyPlex account to initially set it up. But I'm no expert.

I tried the Emby addon with Jellyfin. It saw the server but it would not authenticate. The devs said not to hash the password. So, I copied the Emby addon and passed self._password instead of passwordsha1, but still no joy.
In case you weren't aware, Jellyfin is a fork of Emby, about one year old. I still use Emby so I not fully up to speed with Jellyfin but I think not hashing the password is probably , one of a few, if not the only API change. 

I've never heard of Jellyfin. Maybe I'll take a look once everything works reliably for Emby ;-)