Sectigo is currently experiencing degraded performance with its issuing platforms. Users will experience delays with free SSL certificates being issued or renewed as a result.
You can view Sectigo's status page here:
https://sectigo.status.io/
We will provide further updates as they're made available.
UPDATE 02:16 AM EST: Sectigo reports the problem as resolved.
https://sectigo.status.io/pages/incident/5938a0dbef3e6af26b001921/657be564ffc7610534a1a8be