When I try to link moodle with BigBlueButton it throws me this exception:

Exception - Argument 1 passed to role_get_name() must be an instance of stdClass, boolean given, called in [dirroot]/mod/bigbluebuttonbn/locallib.php on line 439

I can also make a curl from the moodle to the bigbluebutton:

admin@lms:/var/log$ curl http://10.144.40.115/bigbluebutton/api
<response><returncode>SUCCESS</returncode><version>1.0</version></response>admin@lms:/var/log$