Contact button not working

So on the page joinsolar.com/applyhome i have a contact form. I the button looks like its not working but sometimes ill get 50 emails in my inbox. I am seeing error codes but dont know whats going on. Ive tried disabling active plugins but nothing is working.

Hello There,

Thanks for writing in!

Apply button is working fine on my end. I don’t see any error message on browser console. Would you mind confirming again? Try clearing browser cache and then try again.

Thanks.