Certbot fails to download the temporary challenge files, gets 503'd

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: fsrv-m2-stg1.lcgosc.com

I ran this command: certbot certonly --webroot

It produced this output: Certbot failed to authenticate some domains (authenticator: webroot). The Certificate Authority reported these problems:
Domain: fsrv-m2-stg1.lcgosc.com
Type: unauthorized
Detail: Invalid response from http://fsrv-m2-stg1.lcgosc.com/.well-known/acme-challenge/iTM8BkJujhuq1K8pvONpWB1l9RHOMgTajMheG0bDFbU: 503

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.

My web server is (include version): apache inside a docker container.

The operating system my web server runs on is (include version): Ubuntu 20.04.2 LTS

My hosting provider, if applicable, is: Rackspace

I can login to a root shell on my machine (yes or no, or I don't know): yes

I'm using a control panel to manage my site (no, or provide the name and version of the control panel): No

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): certbot 1.29.0

Your backend is not responding: http://fsrv-m2-stg1.lcgosc.com/.well-known/acme-challenge/ .

Fix that first, then --webroot should work.


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