Error on issuing certificate

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1

I ran this command:
sudo certbot --nginx -d fileapi.innovationnxt.com

It produced this output:
Requesting a certificate for fileapi.innovationnxt.com

Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems:
Domain: fileapi.innovationnxt.com
Type: connection
Detail: 202.51.3.192: Fetching http://fileapi.innovationnxt.com/.well-known/acme-challenge/CBpf8QsRxF0VS-U-5dghrJlPaMRoMZEzjKU38RicVps: Timeout during connect (likely firewall problem)

Hint: The Certificate Authority failed to verify the temporary nginx configuration changes made by Certbot. Ensure the listed domains point to this nginx server and that it is accessible 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.

My web server is (include version):
linux server
The operating system my web server runs on is (include version):
Oracle Linux 8

2

Do you have a firewall blocking certain IP addresses?

Because I can connect to your domain using my own test server. And, using the test site https://letsdebug.net

But, I see connections from the production Let's Encrypt system are timing out. This is almost certainly a firewall of some kind.

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