Fatal error: Uncaught Error: Class 'Symfony\Component\Cache\Adapter\AbstractAdapter' not found in /var/www/alldocs/home/rprather/TIWebsite/simplesamlphp_idp/vendor/symfony/cache/Adapter/PdoAdapter.php:20 Stack trace: #0 {main} thrown in /var/www/alldocs/home/rprather/TIWebsite/simplesamlphp_idp/vendor/symfony/cache/Adapter/PdoAdapter.php on line 20