500 error on setting saving in backend

Hi,

I have installed easy_discuss on a test server... I am getting 500 errors when I go to lets say settings->Layout->general and click on SAVE...

In the backend I see

PHP Catchable fatal error: Argument 2 passed to Joomla\\Registry\\AbstractRegistryFormat::getInstance() must be of the type array, string given, called in /var/www/html/libraries/vendor/joomla/registry/src/Registry.php on line 649 and defined in /var/www/html/libraries/vendor/joomla/registry/src/AbstractRegistryFormat.php on line 39, referer: https://dev2.ed-projects.nyu.edu/administrator/index.php?option=com_easydiscuss&view=settings&layout=default_integrations_easysocial&child=integrations

not sure what is causing this... I have latest version of joomla and easy_discuss