error obtaining certificate: Unknown Error

[blastagator]

My Certera instance was working fine and then it stopped renewing some of my certs yielding an error:

fail: Certera.Web.Services.CertificateAcquirer[0] error obtaining certificate: Unknown Error

There is no additional detail in the logs. I tried deleting and re-adding certs and the same error persisted. I even created a new VM and installed from scratch. The only cert that works on the new instance is the cert for Certera itself. Any idea what I can do to troubleshoot this further?