Trying to pre-fill some details for the card payment based on https://developer.paypal.com/docs/checkout/integration-features/standard-card-fields/. But the example https://developer.paypal.com/docs/checkout/integration-features/standard-card-fields/ is not working, because the json does not fit to the types in "@paypal/paypal-js": "^4.1.0". So I adjusted it --> https://developer.paypal.com/docs/api/orders/v2/#definition-payer See also: @paypal\paypal-js\types\apis\orders.d.ts But now the following error accours: {"name":"INVALID_REQUEST","message":"Request is not well-formed, syntactically incorrect, or violates schema.","debug_id":"10a838ea45721","details":[{"field":"/payer/phone/phone_number","location":"body","issue":"MALFORMED_REQUEST_JSON","description":"The request JSON is not well formed."}] My configuration: paypal .Buttons({ createOrder: (data: UnknownObject, actions: CreateOrderActions) => { // This function sets up the details of the transaction, including the amount and line item details. return actions.order.create({ application_context: { shipping_preference: 'NO_SHIPPING', }, payer: { payer_id: '1', birth_date: '2021-01-01', tax_info: { tax_id: '1', tax_id_type: 'string', }, email_address: 'customer@domain.com', phone: { phone_number: '45465', }, name: { given_name: 'PayPal', surname: 'Customer', }, address: { address_line_1: '123 ABC Street', address_line_2: 'Apt 2', admin_area_2: 'San Jose', admin_area_1: 'CA', postal_code: '95121', country_code: 'US', }, }, purchase_units: [ { amount: { value: '0.01', currency_code: 'EUR', }, }, ], }); }, ... I tried different values for phone_number, but always the same error. What is the problem? Thanks, Maik. Continue reading...