I'm attempting to setup Docker on my hosting server, and I have installed Nginx Proxy Manager and am attempting to setup a reverse proxy for the container, with SSL. I can setup the proxy, but during the SSL step, I always get "Internal Error".
I checked the domain with all three protocols on letsdebug.net and they are all green for the domain.
-npm_logs.txt reports "Some challenges have failed"
-letsencrypt-requests_error.log is empty
-letsencrypt.log shows sme errors that I am not educated enough to understand.
I'm not sure what other logs might be needed or enough to determine what is relevant so LMK.
One more thing: I've been hosting websites for decades but when it comes to this stuff, I'm a relative n00b to all this and barely understand what I'm doing. LOL Please reply gently and simply. Thanks 
2025-08-25 18:40:19,504:DEBUG:acme.client:Storing nonce: OkLCVishH2e2aSB22BhfQyv4jTLI4FH6tqRTM2bBcMArROkGyF4
2025-08-25 18:40:19,504:INFO:certbot._internal.auth_handler:Challenge failed for domain docker.78industries.com
2025-08-25 18:40:19,505:INFO:certbot._internal.auth_handler:http-01 challenge for docker.78industries.com
2025-08-25 18:40:19,505:DEBUG:certbot._internal.display.obj:Notifying user:
Certbot failed to authenticate some domains (authenticator: webroot). The Certificate Authority reported these problems:
Domain: docker.78industries.com
Type: unauthorized
Detail: 66.29.129.223: Invalid response from http://docker.78industries.com/.well-known/acme-challenge/nijDEjA3wD7pGmd0IOi9CYwHGPUJDT_NtkmGGUGkMfU: 404
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.
2025-08-25 18:40:19,507:DEBUG:certbot._internal.error_handler:Encountered exception:
Traceback (most recent call last):
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/auth_handler.py", line 108, in handle_authorizations
self._poll_authorizations(authzrs, max_retries, max_time_mins, best_effort)
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/auth_handler.py", line 212, in _poll_authorizations
raise errors.AuthorizationError('Some challenges have failed.')
certbot.errors.AuthorizationError: Some challenges have failed.
2025-08-25 18:40:19,507:DEBUG:certbot._internal.error_handler:Calling registered functions
2025-08-25 18:40:19,508:INFO:certbot._internal.auth_handler:Cleaning up challenges
2025-08-25 18:40:19,508:DEBUG:certbot._internal.plugins.webroot:Removing /data/letsencrypt-acme-challenge/.well-known/acme-challenge/nijDEjA3wD7pGmd0IOi9CYwHGPUJDT_NtkmGGUGkMfU
2025-08-25 18:40:19,508:DEBUG:certbot._internal.plugins.webroot:All challenges cleaned up
2025-08-25 18:40:19,509:DEBUG:certbot._internal.log:Exiting abnormally:
Traceback (most recent call last):
File "/opt/certbot/bin/certbot", line 8, in <module>
sys.exit(main())
^^^^^^
File "/opt/certbot/lib/python3.11/site-packages/certbot/main.py", line 19, in main
return internal_main.main(cli_args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/main.py", line 1879, in main
return config.func(config, plugins)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/main.py", line 1585, in certonly
lineage = _get_and_save_cert(le_client, config, domains, certname, lineage)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/main.py", line 143, in _get_and_save_cert
lineage = le_client.obtain_and_enroll_certificate(domains, certname)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/client.py", line 524, in obtain_and_enroll_certificate
cert, chain, key, _ = self.obtain_certificate(domains)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/client.py", line 425, in obtain_certificate
orderr = self._get_order_and_authorizations(csr.data, self.config.allow_subset_of_names)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/client.py", line 503, in _get_order_and_authorizations
authzr = self.auth_handler.handle_authorizations(orderr, self.config, best_effort)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/auth_handler.py", line 108, in handle_authorizations
self._poll_authorizations(authzrs, max_retries, max_time_mins, best_effort)
File "/opt/certbot/lib/python3.11/site-packages/certbot/_internal/auth_handler.py", line 212, in _poll_authorizations
raise errors.AuthorizationError('Some challenges have failed.')
certbot.errors.AuthorizationError: Some challenges have failed.
2025-08-25 18:40:19,514:ERROR:certbot._internal.log:Some challenges have failed.
My domain is:
docker.78industries.com
I ran this command:
Various N/A? I am having trouble in the GUI of NPM.
It produced this output:
Internal Error.
My web server is (include version):
Apache 2.4.65
The operating system my web server runs on is (include version):
Ubuntu 22.04.5
My hosting provider, if applicable, is:
Namecheap (Dedicated)
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):
A combination of CLI, cPanel, WHM and Remote Desktop, depending on the task.
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):
Im using NGINX Proxy Manager, and as I understand it, it comes with it's own contained version of certbot and certbot is not installed on my hosting server outside of that. I'm not sure how to find out the version NPM is using. (certbot --version returns "certbot not found")