Edit file File name : MailConfiguration.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; final class MailConfiguration { /** * @var string */ private $mailFrom; public function __construct(string $mailFrom) { $this->mailFrom = $mailFrom; } public function getFromAddress(): ?string { if (empty($this->mailFrom)) { return null; } return $this->mailFrom; } } Save