UI-ThemeZ - Vie - Send Message button in Contact form not working

hi guys
Im not a programmer with little experience and have worked on this template for a few weeks. Its now ready to publish… just 1 problem: My ‘Send Massage’ button in the contact.html does not work. I have tried multiple browsers, made sure JS is on in the browser etc etc.

When I click the button, nothing happens, and the button freeze. I have to reload the page for it to come unstuck.

Can anyone help?