Upfront Builder Working

Hello WPMUDEV, I was trying to replicate a site build I had created earlier with Visual Composer with your Upfront Builder, but I was having trouble.

First of all, when I try to save my page layout (Save Theme), I get the spinning wheel of death. As in, it never actually saves

In adding WooCommerce products, is that strictly through shortcodes or widgets? I don't see the option to add widget areas?

I would really like to use the builder, I just need to know I can easily add elements.

Thanks!
Luke