I tried to change the CAPTCHA type of CTA form as attachment(2) from Zoho's one(default type) to my Google reCAPTCHA as attachment(1), but couldn't set the one as attachment(3).

Could you pls tell the correct way to set the Google reCAPTCHA from Zoho's one?

↓attachment 1：Google reCAPTCHA

↓attachment 2：CTA Form

↓attachment 3：Error Message