@leif_alexander I could see that your testing the flow via Sandbox test environment, could you please try now via different test card details or sandbox account. If your still facing any issues, please create a MTS ticket via - https://www.paypal-support.com/s/?language=en_US with the detail information and error details. Note : To add Pay Later button : Render the Pay Later button in a one-time payment integration by passing enable-funding=paylater in the PayPal JavaScript SDK. For details, see enable funding. <script src="https://www.paypal.com/sdk/js?client-id=YOUR_CLIENT_ID&enable-funding=paylater"></script> Add Pay Later offers through an e-commerce platform : https://developer.paypal.com/docs/checkout/pay-later/us/commerce-platforms/
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