I paste the following HTML and javascript code inside the html and Javascript snippet widget. When a user clicks a button on an HTML page, javascript does nothing. Anyone who can assist? HTML: <html> <head> <script src="https://test-gateway.mastercard.com/static/checkout/checkout.min.js"></script> </head> <body> <div id="embed-target"> </div> <input type="button" value="Pay with Embedded Page" onclick="Checkout.showEmbeddedPage('#embed-target');" /> <input type="button" value="Pay with Payment Page" onclick="Checkout.showPaymentPage();" /> <!-- JavaScript widget can be added here (if needed) --> </body> </html> Javascript: function errorCallback(error) { console.log(JSON.stringify(error)); } function cancelCallback() { console.log('Payment cancelled'); } // Check if the Checkout object is defined before configuring it if (typeof Checkout !== "undefined") { Checkout.configure({ session: { id: '<your_initiate_checkout_session_ID>' } }); }