Fatal error: Uncaught Error: Using $this when not in object context in /home/wittyly/public_html/live/hr-witty/vendor/dmstr/yii2-adminlte-asset/example-views/yiisoft/yii2-app/site/login.php:9 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/vendor/dmstr/yii2-adminlte-asset/example-views/yiisoft/yii2-app/site/login.php on line 9