8:17 PM PST
Approving app installation requests on the App Management page should now be working again. We're sorry again for any inconvenience caused.
8:01 PM PST
We're investigating an issue where app installation requests cannot be approved from the App Management page if the workspace has the Approved Apps setting enabled. We're very sorry for the disruption, and we're working on it.
For now, App Admins can approve requests with the Slackbot notification button.
5:22 PM PST