Fatal error: Uncaught Error: Using $this when not in object context in /var/www/html/panel-administracion/vendor/dmstr/yii2-adminlte-asset/example-views/yiisoft/yii2-app/site/login.php:9 Stack trace: #0 {main} thrown in /var/www/html/panel-administracion/vendor/dmstr/yii2-adminlte-asset/example-views/yiisoft/yii2-app/site/login.php on line 9