Plugin issue with theme

Hi,

I am using Boutique theme as well a qtranslate x plugin with in it but I have seen that when I am creating & saving menus items the menu showing as invalid https://nimbus.everhelper.me/client/notes/share/642007/6gdo6gm0omripwr41txp , can you please help me with it?
Site Link: https://202.131.107.107/nielsandnora/

Looking for your answer, its really urgent.

Thanks in advance.