Apple is having a major outage of its online services. No less than 29 of them are reporting major problems, including the App Store, Apple TV+, Apple Music, Podcasts, and some iCloud services.
So it’s not just you. Stop rebooting your computer trying to fix it.
Update: Apple was able to quickly fix some of these, so the current total is eight services still having problems.
Update 2: All problems with Apple online services have now been resolved.