WooCommerce Featured Products is the name of the widget. Although, currently this is now working for me.
I'm separately seeing a similar, but slightly worse behavior with the http://wordpress.org/extend/plugins/ivycat-ajax-testimonials/ plugin and its corresponding widget.
I can't run their widget directly through Page Layout Builder, but I have had some success running their short code on a page, then pulling in that page content as a Genesis Featured Page widget.
When I run their widget through your plugin, if I try to save the widget or save the page, it results in a 502 error on the page. Sometimes I can't get rid of it without deactivating either yours or their plugin. In this case, I'm not sure if this is more of an issue with Page Layout Builder or with Ivy Cat.
I have used WooCommerce on other sites without this issue and I currently can't get it to happen again. I've run Ivy Cat testimonials on lots of sites, never seen anything like this before with it.
I have no idea if the two problems are related....