Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\WebServer\htdocs\bookshelf\vendor\symfony\translation\Test\AbstractProviderFactoryTestCase.php:20 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\symfony\translation\Test\AbstractProviderFactoryTestCase.php on line 20