Navigation Menu: cannot access pages under "more" tab

I’ve noticed that the navigation menu in my website is not working correctly. When the screen is adjusted and the menu items become hidden under the “More” tab, I am unable to click on any items under “more.” Is anyone else having the same issue? Similarly, the search widget in the Navbar sidebar will not let me select it either.

My site is http://www.michaelvcuomo.com/ — resize the window to see the problem.

Thanks.