Fatal error: Uncaught Error: Class "Symfony\Component\Cache\Adapter\AbstractAdapter" not found in C:\xampp\htdocs\instagram\vendor\symfony\cache\Adapter\MemcachedAdapter.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\instagram\vendor\symfony\cache\Adapter\MemcachedAdapter.php on line 23