LetsEncrypt - SSL certificate is not valid

    Well, if everything is ok... it should work..


    BTW, the error reported by certbot, has nothing to do with certbot itself

    Code
    1. Detail: DNS problem: NXDOMAIN looking up A for khopen.xxx.xxx - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for khopen.xxx.xxx - check that a DNS record exists for this domain