Update templates/cart.html

templates/cart.html

@@ -275,7 +275,13 @@
 
    
         function proceedToOrder() {
-            const useRewardPoints = document.getElementById('rewardCheckbox').checked;
+             const checkbox = document.getElementById('rewardCheckbox');
+             let useRewardPoints = false;
+            if (checkbox) {
+               // If the checkbox exists, get its checked status
+               useRewardPoints = checkbox.checked;
+            }
+
             fetch('/checkout', {
                 method: 'POST',
                 headers: { 'Content-Type': 'application/json' },