Requesting certificates doesn't work

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:
infendro.com

I ran this command:
sudo certbot certonly --standalone -d infendro.com

It produced this output:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Requesting a certificate for infendro.com

Certbot failed to authenticate some domains (authenticator: standalone). The Certificate Authority reported these problems:
Domain: infendro.com
Type: connection
Detail: 194.127.196.59: Fetching http://infendro.com/.well-known/acme-challenge/RMAJUih4QVyof6dRRNd-_nfp2YRDpuG8rZzoa9wFnKE: Error getting validation data

Hint: The Certificate Authority failed to download the challenge files from the temporary standalone webserver started by Certbot on port 80. Ensure that the listed domains point to this machine and that it can accept inbound connections 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):
none, standalone

The operating system my web server runs on is (include version):
fedora 38

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):
2.9.0

You have an nginx server responding to HTTP requests to your domain right now.

If you plan to have that running long-term you should use that instead of standalone method. Please explain more about your server configuration.

Request to: infendro.com/194.127.196.59, Result: [Address=194.127.196.59,Address Type=IPv4,Server=nginx/1.25.4

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