Update get_moodle_backup.php

admin/mod/get_moodle_backup.php

 <?php
 
+ini_set('display_errors', 1);
+ini_set('display_startup_errors', 1);
+error_reporting(E_ALL);
+
 header("Content-type: application/json");
 header("Cache-Control: no-cache, no-store, must-revalidate");
 header("Pragma: no-cache");