Hi,
yootheme frameworks fill the GET parameter "layout" with "default" value also when it should be empty, to solve it I have modified our system plugin, so in file at "plugins/system/jsn_system/jsn_system.php" at line 435 I have replaced this:
if((JFactory::getApplication()->input->get('option','')=='com_users' && JFactory::getApplication()->input->get('layout','')=='edit') || (JFactory::getApplication()->input->get('option','')=='com_users' && JFactory::getApplication()->input->get('layout','')=='' && JFactory::getApplication()->input->get('view','')=='registration') || (JFactory::getApplication()->input->get('option','')=='com_jsn' && JFactory::getApplication()->input->get('view','')=='list') || (JFactory::getApplication()->input->get('option')=='com_admin' && JFactory::getApplication()->input->get('view')=='profile'))
with this
if((JFactory::getApplication()->input->get('option','')=='com_users' && JFactory::getApplication()->input->get('layout','')=='edit') || (JFactory::getApplication()->input->get('option','')=='com_users' && (JFactory::getApplication()->input->get('layout','')=='' || JFactory::getApplication()->input->get('layout','')=='default') && JFactory::getApplication()->input->get('view','')=='registration') || (JFactory::getApplication()->input->get('option','')=='com_jsn' && JFactory::getApplication()->input->get('view','')=='list') || (JFactory::getApplication()->input->get('option')=='com_admin' && JFactory::getApplication()->input->get('view')=='profile'))
Now it works on your site and in the next release we will apply this patch to avoid this conflict.