My domain name: mabe.live
For some reason my domain name and subdomains always gives me Error 521, I have an Origin certificate and website itself is encrypted through letsencrypt/nginx proxy manager.
On letsdebug the server seems fine and keycdn looks fine as well but always get an Error 521. I understand this might be a server issue but my ip address accessibility is working find and server and its services are accessible through SSH and Web UI.
I have a running system on Pi 4 with Debian and following softwares OMV, NextCloud, Nginx proxy manager, Portainer, Jellyfin, Cloudflare DDNS.
Cloudflare certificate is on the Origin Server → SSL set to Full → linked in NPM and subdomain is encrypted with Let’s Encrypt (keeping in mind MX records are set up to public ip for www & domain name)
Please guide me where would be the issue as I am not an expert and I am just setting this up for my home and want to access the services from outside my home network safely.