My domain is: Feed-Plex.com
Describe the issue: Synology return me “Failed to connect to Let’s Encrypt. Please make sure the domain name is valid.”
My web server is (include version): Apache 2.4 and PHP 7.3
The operating system my web server runs on (include version) Synology DSM 6.2.3-25426 Update 2 (latest version).
Parameters used to create the certificate:
My hosting provider, if applicable, is OVH (host my domain name and proxies used).
Ports 80 and 443 are open in my router and forward them directly on my Synology. My firewall also contain rules to allow connections using ports 80 and 443.