Message
Your Yuki bundle does not have sufficient rights to run this integration. Go to the Yuki store to extend your bundle (Je Yuki bundel bevat onvoldoende rechten om deze koppeling te kunnen gebruiken. Ga naar de Yuki store om je bundel uit te breiden.).
The domain is not licensed for this functionality.
Cause
Presumably, you have a Yuki bundle with insufficient functionality and the 'Invoicing' module is missing. This module is necessary for synchronizing invoices.
Solution
Contact your accountant or Yuki. Ask them to activate the correct Yuki bundle for you.