Hi,
1. The search button on the top right corner is not printed nor controlled by our plugin, it looks like it is the theme search icon.
2. On that page there are fatal error reports on the javascript console, as well as the plugin scripts are completely missing from the page.
Usually the missing scripts are caused by uncleared cache – clearing all layers of cache (minify, cloudflare, page etc..) may resolve that issue, however I still recommend investigating the error messages as well – as those will block any further javascript execution on the page, and the plugin may not be able to initialize because of it.