Warning: Class 'yii\base\Object' not found in /var/www/html/vendor/mdmsoft/yii2-admin/BaseObject.php on line 6

Fatal error: Uncaught Error: Class 'yii\base\BaseObject' not found in /var/www/html/vendor/mdmsoft/yii2-admin/BaseObject.php:15 Stack trace: #0 {main} thrown in /var/www/html/vendor/mdmsoft/yii2-admin/BaseObject.php on line 15