Duck DNS not working raspiban installation

Hey there,

Due to tons of technical issues i have with the latest OS i got back to the old raspbian ,( modbus not working properly),

I am trying to install it manually DuckDNS ,.

I have followed the installation guide in DucDNS website ( getting OK for settigns )

I have added the
access_token: YOUR_ACCESS_TOKEN

( changed into my domain and token)

Without Lets encrypt , but i cannot get it to work
( Port was open in the router ) but cannot access

any suggestion ?