I have been getting this issue when requesting a letsencrypt ssl
Requesting a certificate for ‘sub.domain.com’ from Let’s Encrypt …
… request was successful!
Configuring webserver to use new certificate and key …
… done
Applying web server configuration …
… done
Re-starting Webmin …
… failed! Webmin server did not write new PID file
Re-starting Usermin …
… done
And because of the restart failing the certificate does not seem to work. Can someone help?