Accessing server from internet not working (only loading)

Hi,

quite new, so please have some patience if my question is using the wrong words here and there.

I have a Truenas scale (dragonfish just now) that works locally. I use nginx to set up proxy and use cloudflare to have some protection for my domain.

The cloudflare A post in the DNS settings points to a subdomain truenas(.)mydomain(.)com with my routers WAN IP. I should mention the nextcloud is up and working and I can reach it from subdomain nextcloud(.)mydomain(.)com. The same setup more or less that is with all the pointings etc.

When I try to access my nextcloud(.)mydomain(.)com it gets to the loading page for my server. But it wont get any further. I cant attach a photo or link, so I can only describe what the message says:
"Connecting to TrueNAS … Make sure the TrueNAS system is powered on and connected to the network. "

What am I missing?

Best regards,
Flamur

mistyped. It should say “when I try to acces my truenas(.)mydomain(.)com”