Fatal error: Declaration of craft\helpers\FileHelper::getExtensionByMimeType($mimeType): string must be compatible with yii\helpers\BaseFileHelper::getExtensionByMimeType($mimeType, $preferShort = false, $magicFile = null) in /var/www/haustechnik-schaeffner.de/vendor/craftcms/cms/src/helpers/FileHelper.php on line 719
Stack trace: #0 /var/www/haustechnik-schaeffner.de/vendor/composer/ClassLoader.php(571): include() #1 /var/www/haustechnik-schaeffner.de/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile() #2 /var/www/haustechnik-schaeffner.de/vendor/craftcms/cms/lib/yii2/Yii.php(36): Composer\Autoload\ClassLoader->loadClass() #3 /var/www/haustechnik-schaeffner.de/vendor/craftcms/cms/bootstrap/bootstrap.php(202): Yii::setAlias() #4 /var/www/haustechnik-schaeffner.de/vendor/craftcms/cms/bootstrap/web.php(51): require('...') #5 /var/www/haustechnik-schaeffner.de/htdocs/index.php(21): require('...') #6 {main}