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Hi,

I have a main domain "studio-och.com" pointing to a static site on Netlify.
I created a subdomain "cms.studio-och.com" pointing to my hosting with a Headless Wordpress.

I want to force HTTPS for my subdomain, but I faced with this error, and I can't create my certificate.

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. https://crt.sh/?q=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: studio-och.com
But I'm trying to force HTTPS to my subdomain: cms.studio-och.com

I ran this command: Let's Encrypt™ SSL - Issue

It produced this output: There was a problem processing your request

Error issuing certificate
Failed to issue certificate
Updating challenge for studio-och.com: acme: error code 403 "urn:ietf:params:acme:error:unauthorized":
Invalid response from https://studio-och.com/.well-known/acme-challenge/7vgDVl1OXEZzN0rLLYCBzPyS4ThR8dgptqTBs2lfCrw [104.198.14.52]: "\n<!doctype html>\n<html lang="en" data-n-head="%7B%22lang%22:%7B%221%22:%22en%22%7D%" (order URL: https://acme-v02.api.letsencrypt.org/acme/order/109094070/7255991869)

My web server is (include version): CPanel 92.0, Apache 2.4.46, Perl 5.16.3

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

My hosting provider, if applicable, is: Netsons

I can login to a root shell on my machine (yes or no, or I don't know): No

I'm using a control panel to manage my site (no, or provide the name and version of the control panel): CPanel 92.0

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

Hi and welcome to the LE community forum :slight_smile:

You say that you are trying to get a cert for:

But the LE failure shows the root domain and IP:

I believe the fix may be found in:

But it has to be running at the IP of:

Name:    cms.studio-och.com
Address: 89.40.172.86

Otherwise, you might be able to handle it in:

For that route, start with showing the output of:
apachectl -S

Yes my root domain is studio-och.com. Netlify has add a SSL certificate to my main domain. Now i want to configure my subdomain certificate.

We are in agreement and I already understand that from your opening post.
I gave you some direction, did you understand me?
You need to execute the command to get the cert on the system:

Name:    cms.studio-och.com
Address: 89.40.172.86

Okkey Thanks,
I run the command on my terminal or somewhere else ?

I dont't have any droplet with SSH.

From my terminal the output is:
VirtualHost configuration:
ServerRoot: "/usr"
Main DocumentRoot: "/Library/WebServer/Documents"
Main ErrorLog: "/private/var/log/apache2/error_log"
Mutex default: dir="/private/var/run/" mechanism=default
Mutex mpm-accept: using_defaults
PidFile: "/private/var/run/httpd.pid"
Define: DUMP_VHOSTS
Define: DUMP_RUN_CFG
User: name="_www" id=70 not_used
Group: name="_www" id=70 not_used

Can you SSH into 89.40.172.86 ?

Nope my client has selected the Hosting Web 100 from netsons, without SSH connection:

Here you can view the domain settings.

Main domain "studio-och.com" pointing to Netlify IP
And "cms.studio-och.com" pointing to Server IP with Wordpress

Schermata-2021-01-11-alle-19-33-13

You may need to solve this in cPanel.
[like I said in my first post]

The link shows that it supports Let's Encrypt.
Maybe their website has some howto instructions.