bSecureCheckout / bsecure-laravel

src/config/config.php

<?php

return [
    'client_id' => env('BSECURE_CLIENT_ID', ''),

The function env was not found. Maybe you did not declare it correctly or list all dependencies?

    'client_secret' => env('BSECURE_CLIENT_SECRET', ''),
    //use 'production' for live orders and 'sandbox' for testing orders. When left empty or `null` the sandbox environment will be used
    'environment' => env('BSECURE_ENVIRONMENT'),
];