"Bundle" is missing from the product type dropdown
WooCommerce must be active; the plugin registers the type on top of WooCommerce. If you activated both in the same page load, reload the products screen once: the type registers on init and shows up from the next request on.
The bundle page loads no JavaScript
That is by design, not a bug. A kit whose quantities are all locked renders as pure server-side HTML. The quantity script only loads when at least one item is customer-adjustable, and the lightbox only when quick view is enabled under MaxtDesign → Bundle Display.
The savings line is not showing
The "you save" line only renders when the bundle actually costs less than the sum of its items. In Sum mode there is never a saving, and in Fixed or Override mode the line hides itself whenever the kit price is equal to or above the item total. Check the math on the Bundle tab, and confirm the savings line is enabled in Bundle Display.
The quick-view lightbox does not open
Quick view is off by default. Enable it under MaxtDesign → Bundle Display, and make sure thumbnails are enabled too: the lightbox opens from the item thumbnail.
Removing one item in the cart removed the whole kit
By design. A bundle is sold as a set, so removing a component removes the group rather than leaving a partial kit at a kit price. Customers who want individual items can buy them from their own product pages (the per-item View links help here).
Customers cannot change a component quantity in the cart
Component quantities are locked to the bundle to keep the group consistent. The editable quantity is the bundle line itself: raising it to 2 doubles every component. Per-item adjustments happen on the product page before adding to cart, on items you have marked adjustable.
Order again is missing on bundle orders
Intentional. Re-adding a stale kit could reorder an outdated composition at an outdated price, so orders containing a bundle do not offer one-click reorder. Customers re-order from the product page, which always reflects the current kit.
The importer shows no bundles
The import screen at MaxtDesign → Import Bundles only lists bundles when WPC Product Bundles or Easy Product Bundles data exists in the database. The source plugin does not need to be active, but its data must still be present. Bundles the importer cannot faithfully map (build-your-own, choose-N, dynamic pricing) are listed as skipped with a reason rather than imported wrong.
Debug mode
// wp-config.php
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);Check wp-content/debug.log for messages.
Getting Support
Product Bundles is not on WordPress.org yet, so support runs through the contact page at /contact. Include your WordPress version, WooCommerce version, PHP version, and steps to reproduce the issue.