Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/exklusivbeautysa/public_html/vendor/contao/manager-plugin/tests/Composer/AppAutoloadPluginTest.php:21 Stack trace: #0 {main} thrown in /home/exklusivbeautysa/public_html/vendor/contao/manager-plugin/tests/Composer/AppAutoloadPluginTest.php on line 21