You need to have the PayNL Magento 2 module and the PayNL Magento 2 GraphQL module installed and configured within your Magento 2 installation.

composer require rapidez/paynl

You can publish the views with:

php artisan vendor:publish --provider="Rapidez\Paynl\PaynlServiceProvider" --tag=views

GNU General Public License v3. Please see License File for more information.