I have turned on Captcha in "Appointments Advance Settings", entered my Public and Private Keys from Google. When I go to the form and enter some dummy data, It shows and check box beside the phrase "I'm not a robot". If I check the box, the Captcha icon spins for moment and a green checkmark appears. But then if I click on the Submit button to book an appointment, nothing happens and the message "Please enter correct reCAPTCHA key." appears above the submit button. Please help me fix this?