External Service Function

There is no error on the web services item (perfectly added automatically during installation process).

I have done that, the two URLs are correct.

You are getting Empty reply from Moodle, and also 2 previous checks are also failing.
This indicates a connection problem between Joomla and Moodle: it may be caused by some security software, problems in DNS configuration...

So, the problem seems to be that you cannot open Moodle from Joomla site. Do you have SSH access to your servers? You could try to use wget in Joomla server to get Moodle home page, and see if that also fails (I would think so)

I do not have access to SSH access to the server. (a shared host).

I first noticed SSH access when I had issue upgrading Moodle due to Antelope > Barracuda (database) conversion

What are the steps to using SSH access to resolve this problem?
Let me see if this could be an exception.

It's not that you need SSH, it was just a way to test for connection issues.

You can also do the following:
- Upload this as connection_test.php to your Joomla server, changing Moodle URL in the code:
Then, access yourjoomlasite/connection_test.php with your browser. If connection is working fine, you should see your Moodle site.
If you don't see it, it means there is a connection issue. If that's the case, you can contact your hosting provider pointing them to this connection script, so they can try to help.

Antonio Durán wrote: What's the error in web services item?
First thing you need to do is double-check URLs in Joomdle config in Joomla and Moodle.

The problem was caused by security settings (expired SSL certificate) inside .htaccess file, causing http > https redirect on all domain and subdomains on cPanel, everything working fine now.

Good to know that you got it working.

Thanks for sharing the cause of the problem, I am sure it could help others in the future.