SSL break nginx setting and stop Benck!

hi
i was trying to setup ssl for my server . i use EC2 amazon bought IP and get domain .tk
and set it to work with the server >> and it works find .
now i want to make ssl to the domain .
i use the tutorial here :
https://frappe.io/docs/user/en/bench/guides/lets-encrypt-ssl-setup.html
sudo -H bench setup lets-encrypt [site-name]

and the result error in nginx dublicated upstream
i use command to make may production setting new again
and i got
Sorry!
We will be back soon.

i tried to fix it but deletiong nginx setting make me go back to the first step !!