https://src.fedoraproject.org/settings#nav-api-tab says that key has expired on 2019-12-31...
It would be nice if you could auto-renew it :) That's an src.fp.o admin key so I can't create it myself.
Extended to 2020-06-30
Metadata Update from @kevin: - Issue close_status updated to: Fixed - Issue status updated to: Closed (was: Open)