Fatal error: Uncaught Error: Class "Symfony\Component\Cache\Adapter\AbstractAdapter" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\cache\Adapter\Psr16Adapter.php:24 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\cache\Adapter\Psr16Adapter.php on line 24