Fatal error: Uncaught Error: Class "Contao\ComponentsInstaller\Test\TestCase" not found in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao-components/installer/tests/Composer/LibraryInstallerTest.php:18 Stack trace: #0 {main} thrown in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao-components/installer/tests/Composer/LibraryInstallerTest.php on line 18