Are you using Laybuy on your Shopify store? You may have received an error message from Shopify regarding the Laybuy Payment system. To resolve this issue please follow the steps below:
1. Login to Shopify and install the Laybuy Payments app: https://apps.shopify.com/
2. It will guide you through the installation process and should pull through the merchant API + ID.
3. Once activated, remove the old Laybuy payment method.
If you have any questions, please don't hesitate to contact us.