My database does not sync over iCloud after moving to a new Mac


I have a new Mac, and copied over my entire installation (with migration assisant) and everything works as it previously did apart from Ninox iCloud syncing. My Ninox database isn't syncing over iCloud anymore (changes made on my new mac are not propagated to my other machine and iPhone, even after a full day). How can I restore syncing?

Ninox Profile

Please restart the icloud service as describes here: