Challenge failed for domain (domain unauthorized)

My domain is:

gnrb.fr

I ran this command:

sudo /usr/local/bin/certbot-auto certonly --csr request.csr --no-bootstrap

It produced this output:

Plugins selected: Authenticator standalone, Installer None
Performing the following challenges:
http-01 challenge for gnrb.fr
Waiting for verification…
Challenge failed for domain gnrb.fr
http-01 challenge for gnrb.fr
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

My web server is : tomcat 8.5.50

The operating system my web server runs on is : debian 9

I can login to a root shell on my machine : yes

The version of my client is 0.28.0

1 Like

You can’t use --standalone if nginx is already listening on your port 80.

You should use --webroot or --nginx

2 Likes

Another instance of Certbot is already running.

I don’t understand. Please tell me more.

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