Problems with joomdle integration moodle3x and joomla3x

Good afternoon, I'm trying to integrate moodle3x and joomla3x using joomdle but I'm having problems that I do not know how to solve, I perform all the installation and configuration procedure of moodle, joomla and joomdle more at the end when I go to the system to see if it occurred Okay the last option that is Joomdle web services returns the Received empty response from Moodle error. I would like someone to help me because so far I have not found answers. Remembering that the firewall of the server is with port 80 released, I added the token of joomla in moodle and also of moodle for joomla.
A picture of the error is attached.
Thank you in advance for helping me.

Hi.

As previous checks are working, it seems like problem must be with web services...some options:
- Incorrect configuration in Moodle. Re-check all steps (enable networking and protocols, etc).
- Something (most likely some security software) is blocking xmlrpc traffic.