Sync Failed

Hello,
I did all the Plugin and Moodle settings and whenever I try to synchronize the error occurs:
Error ! Synchronization cannot be done.
I auditioned in Moodle and both user and password as with the token and get the following error :
URL: http://udep.com.br/ava/webservice/xmlrpc/simpleserver.php?wsusername=admin&wspassword=xxxver01%2A
exception ‘Zend_XmlRpc_Client_FaultException’ with message ‘Unknown error’ in /home/u485254899/public_html/ava/lib/zend/Zend/XmlRpc/Client.php:370
Stack trace:
#0 /home/u485254899/public_html/ava/webservice/xmlrpc/locallib.php(134): Zend_XmlRpc_Client->call(‘core_course_cre…’, Array)
#1 /home/u485254899/public_html/ava/admin/webservice/testclient.php(154): webservice_xmlrpc_test_client->simpletest(‘http://udep.com…’, ‘core_course_cre…’, Array)
#2 {main}

https://wordpress.org/plugins/moowoodle/