Fatal error: Uncaught Error: Class "Symfony\Component\Translation\Test\AbstractProviderFactoryTestCase" not found in C:\WebServer\htdocs\bookshelf\vendor\symfony\translation\Test\ProviderFactoryTestCase.php:29 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\symfony\translation\Test\ProviderFactoryTestCase.php on line 29