Nginx Proxy Manager - SSL creation fail

Hello everyone. Today I’m facing the weirdest issue I’ve ever seen in my entire life:
two days ago I nuked my Linux installation because I’m dumb and I had to reinstall everything from scratch.
I set up everything as I always do, get to the Nginx Proxy Manager container and it deployed correctly.
I accessed the GUI and went in to drop my duckdns domain to create a new SSL certificate.
Result: internal error.
Went to check the logs and it says “certificate invalid” right after I finished deplyoing the container.
What’s after is this:

[12/5/2021] [10:09:42 AM] [SSL      ] › ℹ  info      Command: certbot certonly --config "/etc/letsencrypt.ini" --cert-name "npm-10" --agree-tos --authenticator webroot --email "[REDACTED]" --preferred-challenges "dns,http" --domains "[REDACTED]" ,
[12/5/2021] [10:09:42 AM] [Nginx    ] › ℹ  info      Reloading Nginx,
[12/5/2021] [10:09:42 AM] [SSL      ] › ℹ  info      Requesting Let'sEncrypt certificates for Cert #10:,
[12/5/2021] [10:09:57 AM] [Nginx    ] › ℹ  info      Reloading Nginx,
[12/5/2021] [10:09:57 AM] [Express  ] › ⚠  warning   Command failed: certbot certonly --config "/etc/letsencrypt.ini" --cert-name "npm-10" --agree-tos --authenticator webroot --email "[REDACTED]" --preferred-challenges "dns,http" --domains "[REDACTED]" ,
Saving debug log to /var/log/letsencrypt/letsencrypt.log,
Some challenges have failed.,
Ask for help or search for solutions at See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.

I’m stumped because I looked everywhere for a possible solution but nothing seems to work. Some people say that this issue fixed itself, jc21 (who made NPM) told to a user that he can’t replicate this issue. I don’t think there are any networking issues because all of my containers can reach each others.
The only things I changed before this installation was to try and use a non standard HTTP and HTTPS port on the container itself and open those through my router. After I’ve done that I did this reinstall but things keep not working for some reasons.