The Certificate Authority failed to download the temporary challenge files created by Certbot

[john-ghost-island]

Thank you for the great solution for SSL,
but I have a strange situation,
the error message below...

Creating dummy certificate for 198xloser.cf ...

Creating network "nginx-certbot_default" with the default driver
Creating nginx-certbot_certbot_run ... done
Generating a RSA private key
.......................................................................................++++
...................................................................................................................................................................................................................................................................................................++++
writing new private key to '/etc/letsencrypt/live/198xloser.cf/privkey.pem'

Starting nginx ...

Docker Compose is now in the Docker CLI, try docker compose up

Creating nginx-certbot_nginx_1 ... done

Deleting dummy certificate for 198xloser.cf ...

Creating nginx-certbot_certbot_run ... done

Requesting Let's Encrypt certificate for 198xloser.cf ...

Creating nginx-certbot_certbot_run ... done
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Requesting a certificate for 198xloser.cf

Certbot failed to authenticate some domains (authenticator: webroot). The Certificate Authority reported these problems:
Domain: 198xloser.cf
Type: connection
Detail: Fetching http://198xloser.cf/.well-known/acme-challenge/OP_kh4BLmPng_X7c3wXDGCReZz-yS87Q_FV0fLfAhOs: Connection refused

Hint: The Certificate Authority failed to download the temporary challenge files created by Certbot. Ensure that the listed domains serve their content from the provided --webroot-path/-w and that files created there can be downloaded from the internet.

Some challenges have failed.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.
ERROR: 1

Reloading nginx ...

cannot exec in a stopped state: unknown

[john-ghost-island]

it's my fault, didn't change all 'example.org' to my domain on app.conf