Fatal error: Uncaught Error: Interface 'Contao\ManagerPlugin\Config\ConfigPluginInterface' not found in /home/eberhardschwarze/public_html/vendor/contao/manager-plugin/tests/Fixtures/PluginLoader/FooConfigPlugin.php:8
Stack trace:
#0 {main}
thrown in /home/eberhardschwarze/public_html/vendor/contao/manager-plugin/tests/Fixtures/PluginLoader/FooConfigPlugin.php on line 8