try demonstrator

demostrator/swicthepp_demonstrator.php

@@ -127,6 +127,8 @@ if (!empty($_POST['eppCommand'])) {
 
         if (is_array($client)) {
             $error = $client['msg'];
+            print_r($error);
+            exit;
         }
         $request = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>
                             <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">