Thanks for that. I see you got a wildcard cert from Let's Encrypt on Sep6. And, that is the one your server is currently using.
There was a change for Let's Encrypt on Sept15. Maybe your "Stale CSR" message is related to this
Is you AutoSSL still configured to use Let's Encrypt though? Because the error message sounds like the problem is with the cPanel Store. You got some certs for certain domain names from that recently too