Flutterwave Rave Inline Checkout integration Error

I have tried the Flutterwave get paid button. It returns the following error

"status":"error","message":"merchant public key required","data":null}

The code is below:

<form>
    <a class="flwpug_getpaid" data-PBFPubKey="FLWPUBK-MY PUBLIC KEY FROM DASHBOARD-X" data-txref="rave-123456" data-amount="10" data-customer_email="info@getset.com" data-currency="GHS" data-pay_button_text="Support Us Now" data-country="GH" data-redirect_url="https://your-website.com/urlredirect"></a>
    <script type="text/javascript" src="https://api.ravepay.co/flwv3-pug/getpaidx/api/flwpbf-inline.js"></script>
</form>