I try to fill in the form at Talk to an expert but nothing happens? I was expecting that the form changes and perhaps a confirmation email with a ticket number?
I have just tested it, and it did changed to a confirmation page and I did receive an email.
Can you say what browser, version and OS are you using? I also tested with Adguard activated network wide as recently I had a form not working because it and it also worked.
Meanwhile, If you want, please, end an email to duda.nogueira@rocket.chat so I can route it internally.