App Store won't update apps. Both my iPad and my iMac are affected.
App Store is failing update apps. Several apps show that an update is available, but tapping or clicking "update" fails to update them. At first the "update" buttons turn into the updating circle, but within one second the update buttons reappear. I have signed out of iCloud and App Store and signed in again but that does not resolve the trouble. Rebooting does not resolve the trouble. I tried to update each app individually but that does not resolve the trouble. I went to the apps' pages and tried to update them from there but that does not resolve the trouble. I can download new apps, but I cannot update apps.
iPad Pro, iOS 13