Fatal error: Uncaught Error: Class "core\oauth2\client" not found in C:\xampp\htdocs\laberit01\html\moodle\repository\dropbox\classes\dropbox.php:38 Stack trace: #0 {main} thrown in C:\xampp\htdocs\laberit01\html\moodle\repository\dropbox\classes\dropbox.php on line 38