Baylys Menu – Dropdown Invisible on web but works on mobile

Hello,

I am using the Baylys theme on a client’s website and I’m having an issue with the menu that doesn’t seem to be what most of the other issues are.

The site is: http://ageofalliances.com

The issue is that I have added some pages to a drop down menu under the Nav heading Factions. The menu is there, the links are there and you can scroll over them and click them, but the menu itself is .. invisible?

Oddly, the mobile version works (and looks) just fine.

I cannot find in the CSS code where to change or fix this. Any suggestions would be greatly appreciated, thank you!