Updating from 2.3.1 to 3.0.1

 ErrorException: Warning [2] Gelato
Message: include_once(D:\WEBSERVER\OpenServer\domains\test1\plugins/contact/contact.plugin.php) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory
Location: D:\WEBSERVER\OpenServer\domains\test1\engine\Plugin\Plugin.php (line 77)
  71         $records = $plugins->select(null, 'all', null, array('location', 'status', 'priority'), 'priority', 'ASC');
  72 
  73         // Now include plugins from $records plugins array
  74         // If plugin is active then load it to the system.
  75         foreach ($records as $record) {
  76             if ($record['status'] == 'active') {
  77                 include_once ROOT . DS . $record['location'];
  78             }
  79         }
  80     }
  81 
  82     /**
  83      * Get plugin admin