“This page doesn’t seem to exit” on mobile only

Got this plugin working really well on Desktop. However, it works well on mobile if you enter a search term, and then select a single product. But if you enter a search term and then hit ENTER for all results it gives error “This page doesn’t seem to exit”. Then you can then enter a search term for a normal search. Mobile doesn’t have a separate All results landing page, so I cant see why it wouldn’t work. I have created a new All Results landing page with the correct short code, but still the same. Any ideas out there????