XML-RPC Error (404): Unknown error

Hi,
I have install Joomdle and Moodle with the protocol « installation of Joomdle »
In Joomla in administrator, when I want to change password I have un message : XML-RPC Error (404): Unknown error.
In Component – Joomdle – User, when I click on one user and on the button “Add user to Moodle” I have the same message “
What can I do to synchronyse all the users and no message “XML-RPC Error (404): Unknown error”
Thanks’ in advance.
Hi,
I have install

Hi there,

Please let us know what versions of Joomla, Jomdle, Moodle and PHP you have.

Thanks

HI,
thank you for the answer
HI,
thank you for the answer
Joomla 2.3 and 3.6
Joomdle1.0.6 for component
Moodle 3.0.4
Php 7. And 5.6.20
If you can help.
Regards!

Enable debugging in Moodle to get more info about 404 error.

It's ok for news users, and I don't mind for the users of the latest years
Regard