[Plugin: Polylang] Polylang breaks search in Spun theme

Hi,
When nothing is entered in search bar and the search is executed, the result is broken. With Polylang disabled it works ok.

Link: https://mududizainas.lt/mudu

The search bar is at the bottom, you have to press the green circle for it to appear.

Theme: https://www.ads-software.com/extend/themes/spun/

https://www.ads-software.com/extend/plugins/polylang/