Fatal error: Uncaught Error: Using $this when not in object context in /home2/yiikharazmisabt/public_html/vendor/yii2mod/yii2-rbac/views/_dualListBox.php:11 Stack trace: #0 {main} thrown in /home2/yiikharazmisabt/public_html/vendor/yii2mod/yii2-rbac/views/_dualListBox.php on line 11