Ysul
$ certbot renew [...] - The following errors were reported by the server: Domain: cloud.dereckson.be Type: unauthorized Detail: Invalid response from http://cloud.dereckson.be/.well-known/acme-challenge/h5O-bwrPW8Xk3nj9ZwsVLTvPILutEImAh5p809cCOgU: "<!DOCTYPE html> <!--[if lte IE 8]><html class="ng-csp ie ie8 lte9 lte8" data-placeholder-focus="false" lang="en" ><![endif]--> <" To fix these errors, please make sure that your domain name was entered correctly and the DNS A record(s) for that domain contain(s) the right IP address.