icloud storage warning in photos when I still have storage available.
In Photos on my iMac I get the warning that my iCloud storage is full. When I select "learn more" I see that I have actually 17.94 GB left of my 50 GB storage capacity.
Does anyone one have any ideas why I still get this message and how I can resolve this so all my photo's from my iMac can be backed up to iCloud?