Root menu not clickable

Hi, can someone helped, I’ve installed the app and have the following structure;

About us
– John
– Sue
– Pete

However in responsive mode, the ‘About us’ button isn’t accessible, it just only allows me to drop down making that page ineffective

Can anyone help, I need that page to be “clickable” as well?

https://ww.wp.xz.cn/plugins/slicknav-mobile-menu/