Data Sync Problem while trying to import FH3 Designs

Greetings guys,

I got some issues trying to import old liveries from FH3 into Forza 7.

My Sync Data got stuck at 0%, i´ve tested this over night with a 9h duration, but still stuck at 0%.

I´m logged into the Xbox App, as well as the Microsoft Store account.

There´s no difference in starting it out of the app, or starting it out of the start menu.

Is there anything i didn´t notice? Am i doin anything completely wrong? I really want to have my created Designs in F7, so maybe anyone can help

Cheers mates