Problem: Product Listing block shows but "Add to Cart" button doesn't work Verify WordPress sessions are enabled Check browser console for JavaScript errors Verify AJAX endpoints are accessible Check that Cart Page is configured in Shopping Cart Settings Try disabling caching plugins temporarily Problem: Items in cart on cart page but empty on checkout page Verify both pages are using correct blocks (Shopping Cart on cart page, Checkout on checkout page) Check session handling - some themes may have issues Verify theme calls wp_footer() to ensure sessions saved Check WordPress error logs for AJAX errors Problem: Orders List block shows empty state even though user completed purchases Verify user is logged in (blocks don't show guest orders) Check that orders are actually created in Orders