Fatal error: Uncaught Error: Class 'yii\helpers\FileHelper' not found in /home/mpolsk5/public_html/seocomo/craft/vendor/craftcms/cms/src/helpers/FileHelper.php:27 Stack trace: #0 {main} thrown in /home/mpolsk5/public_html/seocomo/craft/vendor/craftcms/cms/src/helpers/FileHelper.php on line 27