https://stg.pagure.io shows
Websites prove their identity via certificates, which are valid for a set time period. The certificate for stg.pagure.io expired on 3/2/2023. Error code: SEC_ERROR_EXPIRED_CERTIFICATE
Fixed and added to monitoring so it doesn't happen again.
Thanks for the report!
Metadata Update from @kevin: - Issue close_status updated to: Fixed - Issue status updated to: Closed (was: Open)