Error when requesting certificate from Nginx Proxy Manager

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:marshan.duckdns.org

I ran this command: certbot certonly --config "/etc/letsencrypt.ini" --cert-name "npm-10" --agree-tos --authenticator webroot --email "james_d_marshall@yahoo.co.uk" --preferred-challenges "dns,http" --domains "marshan.duckdns.org"

It produced this output:
[4/13/2022] [9:59:07 PM] [Nginx ] › :information_source: info Reloading Nginx
[4/13/2022] [9:59:07 PM] [Express ] › :warning: warning Command failed: certbot certonly --config "/etc/letsencrypt.ini" --cert-name "npm-10" --agree-tos --authenticator webroot --email "james_d_marshall@yahoo.co.uk" --preferred-challenges "dns,http" --domains "marshan.duckdns.org"

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Some challenges have failed.
and this is the log file entry

[4/13/2022] [9:59:07 PM] [Nginx ] › :information_source: info Reloading Nginx
[4/13/2022] [9:59:07 PM] [Express ] › :warning: warning Command failed: certbot certonly --config "/etc/letsencrypt.ini" --cert-name "npm-10" --agree-tos --authenticator webroot --email "james_d_marshall@yahoo.co.uk" --preferred-challenges "dns,http" --domains "marshan.duckdns.org"

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Some challenges have failed.

My web server is (include version): Nginx Proxy Manager 1.26.0

The operating system my web server runs on is (include version): unraid 6.9.2

My hosting provider, if applicable, is: an

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):

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

Welcome to the community @Hairball359

You are missing the --webroot-path option which should name the root folder in your nginx server block.
https://eff-certbot.readthedocs.io/en/stable/using.html#certbot-command-line-options

If adding that still does not work then please post the error message you get

My advice? Don't use Nginx Proxy Manager, IMHO it's terrible in its implementation regarding certificates/ACME. Or open a ticket/thread with the NPM support system.

thanks i used your advice and have stopped using Nginx

Note that my advice was about Nginx Proxy Manager and not nginx itself. Two different things entirely.