Fatal error: Uncaught Error: Class "base_attribute" not found in C:\xampp\htdocs\laberit01\html\moodle\backup\util\structure\backup_attribute.class.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\laberit01\html\moodle\backup\util\structure\backup_attribute.class.php on line 30