Fatal error: Uncaught Error: Class 'yii\base\Behavior' not found in /home/mpolsk5/public_html/visibilityfuel.com/vendor/craftcms/cms/src/behaviors/BaseRevisionBehavior.php:24 Stack trace: #0 {main} thrown in /home/mpolsk5/public_html/visibilityfuel.com/vendor/craftcms/cms/src/behaviors/BaseRevisionBehavior.php on line 24