Don't output errors from remote commands as it breaks ui

web/includes/Server.php

@@ -152,7 +152,7 @@ class Server extends ZM_Object {
 
     $context = stream_context_create();
     try {
-      $result = file_get_contents($url, false, $context);
+      $result = @file_get_contents($url, false, $context);
       if ($result === FALSE) { /* Handle error */
         Error("Error using $url");
       }