Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Application\www\E-Tracking\vendor\phar-io\version\tests\Integration\VersionConstraintParserTest.php:18 Stack trace: #0 {main} thrown in D:\Application\www\E-Tracking\vendor\phar-io\version\tests\Integration\VersionConstraintParserTest.php on line 18