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Subject: Apple Pay JS - "Payment Was Cancelled by the User" Issue (Braintree + Server-Side Validation) Issue I am implementing Apple Pay using Braintree with server-side validation. However, when initiating the payment process, I receive the following error: [Log] Payment was cancelled by the user: (apple-pay-test-ucxp.onrender.com, line 286) Additionally, the console logs an ApplePayCancelEvent with: sessionError: {code: "unknown", info: {}} Despite successfully fetching merchant session validation data from the backend and completing merchant validation, the payment process does not proceed. Setup Details Payment Processor: Braintree (Apple Pay integration) Backend API: Fetching merchant session validation via createPaymentSessionGet Payment Processing: Using Braintree nonce tokenization Client-Side Code (Key Sections) session.onvalidatemerchant = async (event) => { try { const merchantSession = await fetch( "https://api.paybito.com:9443/ApplePay/api/apple-pay/createPaymentSessionGet", { method: "GET", headers: { "Content-Type": "application/json" }, } ).then((res) => res.json()); session.completeMerchantValidation(merchantSession); } catch (err) { console.error("Merchant validation failed:", err); session.abort(); } }; session.onpaymentauthorized = async (event) => { try { const payload = await applePayInstance.tokenize({ token: event.payment.token, }); const response = await fetch( "https://api.paybito.com:9443/ApplePay/api/braintree/process-payment", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ nonce: payload.nonce }), } ).then((res) => res.json()); if (response.success) { session.completePayment(ApplePaySession.STATUS_SUCCESS); } else { session.completePayment(ApplePaySession.STATUS_FAILURE); } } catch (err) { console.error("Payment authorization failed:", err); session.completePayment(ApplePaySession.STATUS_FAILURE); } }; Observations Merchant validation completes successfully. The error occurs before onpaymentauthorized executes. Session error code is unknown, making debugging difficult. Questions Has anyone encountered this issue before? Could this be related to how the validation session is fetched from the backend? Is there a way to obtain more meaningful debug information from Apple Pay? Any insights would be greatly appreciated!