The File Upload Field’s ‘Choose Files’ link doesn’t work

Hello,

We’ve been having issues with the ‘Choose Files’ link of the upload field. When we click on it, nothing happens. (Except, on the lower-left of the screen, it briefly reads ‘Javascrpit:void(0)’ then disappears.)

Could you please take a look and let us know how we can proceed to tackle this issue? Thanks so much!

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