@Detected You have used the Get action and are adding your body to the headers. You need to use POST request - you can change the method to DELETE in the Post action
Finally I ended using (it's also working for different languages of Recaptcha challenges) if someone searches for the same:
">CSS>iframe[src^=' https://www.google.com/recaptcha/api2/bframe ']>FRAME> >CSS>#recaptcha-verify-button"
