The app for the payment provider doesn't work
This problem is usually caused by one of these reasons:
- An API key is not entered
- An API key has been entered incorrectly
- The account with the payment provider or the payment method is not activated
The app settings can be found at Settings > Apps > Installed apps.
The documentation for the apps can be found on the AppWebshop.
- If it still does not work, please contact your payment provider.