ReCAPTCHA Add Problem : Error for Site Owner: Invalid Key Type

[Air Boostiso]

Dear Sir,

We have add google ReCAPTCHA code in my site for https://airboostiso.com but show in this type of error show Error for Site Owner: Invalid Key Type. How i can rectify this problems. Please provide me advice in my  airbo...@gmail.com id.

https://airboostiso.com/enquiry.html

Google ReCAPTCHA Key =  data-sitekey="6LddRcMUAAAAAKU6LMUrKCj8O02MeXj_7K8EAejB"