Fatal error: Class 'QM_Dispatcher' not found in C:\inetpub\wwwroot\wordpress\wp-content\plugins\query-monitor\dispatchers\AJAX.php on line 17

Fatal error: Class 'QM_Dispatcher' not found in C:\inetpub\wwwroot\wordpress\wp-content\plugins\query-monitor\dispatchers\AJAX.php on line 17