Cannot add product to gift pack

Hi, I have trying out this plugin before buying the pro and I am having an issue when searching for a product to add to a gift pack. The search bar does not function and no products can be searched.

I tried using a different theme and only using woocommerce and Jagif as active plugins and the issue persisted. Any ideas how this can be resolved?

The page I need help with: [log in to see the link]