Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Bundle\Bundle" not found in C:\xampp\htdocs\adminlte3\vendor\symfony\http-kernel\Bundle 2\AbstractBundle.php:26 Stack trace: #0 {main} thrown in C:\xampp\htdocs\adminlte3\vendor\symfony\http-kernel\Bundle 2\AbstractBundle.php on line 26