SOLVED: Jellyfin and Mopidy no Connection

[Computerboss]

Thank you very much for your detailed answer!
I have installed all new and now it worked

I have made few changes and restartet the rasperry but i think the changes will not be confirmed. So i have tryied
sudo systemctl restart mopidy
after that the config reloads correctly and i can access to my jellyfin its very great

Is it possible to play music synchron on two or three rasperrys like apple airplay or only individual control each rasperry?

Greetings and thank you