An error is returned when trying to open the filters popover in mobile.

jetpack-colophon.jsx:38 Uncaught (in promise) TypeError: Cannot read property 'split' of undefined at y.JetpackColophon [as constructor]

The errors originates here:

https://github.com/Automattic/jetpack/blob/instant-search-master/modules/search/instant-search/components/jetpack-colophon.jsx#L38