Hi all, I have upgraded Debian 8 servers with ISPConfig 3.1.x to Debian 9 with ISPConfig 3.2.2. That is OK. I would like to move from cerbot to acme.sh, so I manually remove cerbot from /opt directory, /etc/letsencrypt directory and all SSL sites, created with ISPConfig from /etc/apache/sites-enabled, installed acme.sh and disabled and then enabled LE SSL in ISPConfig with succes. Now, I need LE SSL cert for ISPConfig Interface, postfix, pureftp and dovecot, so I do: ispconfig_update.sh --force as root and answer yes to create new ssl cert It ends with: srv1.domain.tld:Verify error:Invalid response from http://srv1.domain.tld/.well-known/acme-challenge/1XeecFzXrLEMudSnhfih93QG5yL1dcbD8xP3T3hwkoc [xx.xxx.xxx.xxx]: [Mon Feb 22 00:07:13 CET 2021] Please add '--debug' or '--log' to check more details. [Mon Feb 22 00:07:13 CET 2021] See: https://github.com/acmesh-official/acme.sh/wiki/How-to-debug-acme.sh Issuing certificate via acme.sh failed. Please check that your hostname can be verified by letsencrypt usr/local/ispconfig/interface/acme/.well-known/acme-challenge/1XeecFzXrLEMudSnhfih93QG5yL1dcbD8xP3T3hwkoc does not created, it contains only challenge from SSL webs in ISConfig and it is the same for all these webs, but different from this one. IT is correct, or must be the same as other webs in ISPConfig? I have searched, but no reason with using it with ISPConfig, can anyone please help, how to fix it?