Mega Menu error in Sticky header

Hi all!
I am using Core 5.6, Flatsome 3.11.1.
I put my main menu in Bottom header and setup sticky header.
But when I hower to to the “Tour”, the mega menu shown in error. I there anyway to style it properly?
Thanks and I do appreciate any suggestions.
This is my site [redundant link removed by moderator]

The page I need help with: [log in to see the link]

Source link