@girish Yes these are the certificates issued yesterday, because I put the server back up last night to move the applications from the old server. It was fine with the certificate until this morning. At work, the certificate started failing. I did a certificate refresh several times, cleared the browser and tests on several office devices and the error continues to appear.
EDIT: Now I reinstalled Cloudron but with manual settings for the domain with a Polish provider and it works fine so far. The certificate generates and displays without error. We will see in a few hours.