This does not work with una 13 b4. throws this error and when I deactive the app the error goes away.

Fatal error: Uncaught Error: Call to undefined method MsolutionsNotifyConfig::isInternalNotifications() in /public_html/modules/base/groups/classes/BxBaseModGroupsAlertsResponse.php:23 Stack trace: #0 public_html/modules/msolutions/notify/classes/MsolutionsNotifyAlertsResponse.php(16): BxBaseModGroupsAlertsResponse->__construct() #1 public_html/inc/classes/BxDolAlerts.php(131): MsolutionsNotifyAlertsResponse->__construct() #2 public_html/modules/boonex/notifications/classes/BxNtfsModule.php(441): BxDolAlerts->alert() #3 public_html/modules/boonex/notifications/classes/BxNtfsResponse.php(61): BxNtfsModule->onPost(37997) #4 public_html/inc/classes/BxDolAlerts.php(132): BxNtfsResponse->response(Object(BxDolAlerts)) #5 public_html/inc/utils.inc.php(1709): BxDolAlerts->alert() #6 public_html/modules/msolutions/notify/classes/MsolutionsNotifyModule.php(602): bx_alert('msolutions_noti...', 'doViewedme', '677', 2 in public_html/modules/base/groups/classes/BxBaseModGroupsAlertsResponse.php on line 23