Can you please help me fix my mobile menu?

Hello, okay so I'm using a theme called X theme and in Tablet and Phone views the mobile menu doesnt work. On click on the button the menu instantly retracts.

I believe its almost certainly a css issue.
I'm using CSSHero plugin on this site perhaps you're familiar with it.
I've tried to get help from them to no avail really so I'm hoping you folks might be able to assist me.

I think the offending element may be the Header Nav Area but I can't see the problem nor am I certain that's the correct element or the one causing the issue.

http://www.SolutionsFor.US

Please help if you can!
Thanks
Joseph