Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\symfony\mailer\Test\AbstractTransportFactoryTestCase.php:21 Stack trace: #0 {main} thrown in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\symfony\mailer\Test\AbstractTransportFactoryTestCase.php on line 21