Apple, through its “System Status” page, recently reported that some users may be experiencing difficulties with some iCloud.
More precisely, the company said that the Photos, The iCloud Drive it’s the Grades are performing slower than normal. In addition to them, users who are trying to upgrade their respective iCloud storage plans may not be able to do so due to these problems.
Apple, of course, is working to normalize everything – we’ll let you know as soon as it’s resolved.
Update May 14, 2019 at 13:27
This is quick: apparently, everything is already normalized.