My main menu items are now showing sub menu items when hovering?

Hi Guys,

I have an issue with sub menus not appearing when hovering over main menu items on my site. It does however work on smart phone just not on web browsers.

It was working perfectly fine previously. I have gone through the process of changing theme, and deactivating plugins but have not been able to find the cause.

Need urgent assistance!

Cheers as always,