You need to enable YITH Compare plugin for product comparison to work

context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"name":"Home","@id":"https:\/\/www.brightwhitepaper.com"}},{"@type":"ListItem","position":2,"item":{"name":"Compare","@id":"https:\/\/www.brightwhitepaper.com\/compare\/"