Fatal error: Uncaught Error: Call to undefined function env() in D:\xampp\htdocs\bkash-biller-portal-app\vendor\laravel\tinker\config\tinker.php:61 Stack trace: #0 {main} thrown in D:\xampp\htdocs\bkash-biller-portal-app\vendor\laravel\tinker\config\tinker.php on line 61