Edit file File name : ConfigLoaderInterface.php Content :<?php /* * This file is part of the Kimai time-tracking app. * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace App\Configuration; use App\Entity\Configuration; interface ConfigLoaderInterface { /** * @param null|string $prefix * @return Configuration[] */ public function getConfiguration(?string $prefix = null): array; } Save