I am trying to use WFFM reCaptcha field on one of my WFFM forms. The form is based on Sitecore MVC layout and using version 8.2 rev. 161129 (Update-1). I followed this guide and the reCaptcha field is showing. But when I try to submit the form, the form is giving the error that the captcha field is required.
I followed this URL to fix the issue, but I am getting another error as per the screenshot below. I don't have any server-side error in the log. Any help is really appreciated.