@SvenSommer thanks a lot for your effort.
Unfortunatelly I can’t see anything beside the header on my Mirror. I tried two different APIs Logins, also checked the ViewID several times and tried to get it work with the standard settings for the config. But still it shows just the header on the screen. Also Debug Mode active does not bring any data to the mirror.
ViewID is correct
API Access was given
Email Adress is correct
Permission in Analytics was given for Viewing
Can you please advise, maybe you had this issue before.