Nginx Proxy Manager "Internal Error"

I add-on DuckDNS and Ngix Proxy to allow me remote access to my HA. However, with Nginx Proxy Manager, i have a “internal error”.

Any ideas?

after checking again and again, I think the problem come from router, even if port forwarding activated. I make a test from and I get the following error

Error: I could not see your service on on port (80)
Reason: Connection timed out

this is the screenshot of my router forwarding port

is there any other way to open port 80 and 443?