Fatal error: Uncaught Error: Interface 'Psr\Cache\CacheItemPoolInterface' not found in /home/itscm/dev.its.cm/apps/vendor/symfony/cache/Tests/Fixtures/ExternalAdapter.php:23 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/apps/vendor/symfony/cache/Tests/Fixtures/ExternalAdapter.php on line 23