Mobile Menu Dropdown Trigger

The Mobile menu dropdown trigger "arrow" turns down and sideways again, but no action is performed. The submenu just isn't opening.
Which is a big problem for mobile users.
I've managed to not use your support forum up till now, but this problem eludes me.

I'm at a loss and need some assistance please.
While I still have 10 days left of support.

Please see website attached.

Kindest Regards

To update, I should note that i converted it to php so I could have the header and other content load in for all pages.

Ok, I checked and double checked, there are no JS errors on the page that belong to me.

I have since reupdated all "your" files in css and js and the sub menu now works.
HOWEVER!
The Menu is not showing all the links. If you take a look at PROJECTS on the menu on the mobile (drop it down), and compare it to the desktop menu under the PROJECTS....the way i have it setup is with 5 columns under the megamenu, within the same div.
Can I put 2 columns on the mobile menu to show more links?
And can the whole mobile menu be extended in height to cover all the links in either case.

It would be easier if it could be in 2 columns on the mobile menu as there will be 50 links there permanantly...as the client does a new project, i would update to project 51 in succession for example, and remove project 1, add project 52, remove project 2, and so on....
2 columns would be much neater.

Kindest Regards

Nevermind, I've fixed it.

Thanks anyway.
You can close this ticket now =)

Good luck