NGINX SSL proxy Firewall issues?

Since I’m using a edgerouter lite I never managed to get duckdns to work again.
I decided to give a try with NGINX SSL proxy addon.
The instalation seems quite simple (used this setup).

but even this first part doesn’t work.
I can’t even proceed to the SSL part.
I’m port forwarding port 80 and 443 for the hassio ip.
Could it be a firewall rule? Hassio is on a VLAN (40) with some limitation, but I guess this is not the problem. Any sugestion?
Thanks in advance