reCaptcha not showing.

Trying to add a reCaptcha to the sharing module email button, following these instructions:

https://jetpack.com/2013/04/15/recaptcha-email-sharing-button/
https://jetpack.com/support/sharing/

I have reCaptcha working on other parts of my site (Gravity Forms), so I know my keys are working.

However when I add them to the wp-config.php via the instructions, like so:

define( 'RECAPTCHA_PUBLIC_KEY', 'SiteKeyHere' );
define( 'RECAPTCHA_PRIVATE_KEY', 'SecretKeyHere' );

Nothing happening…. not sure what’s up?

https://69th-dept.com/shop/dresses/xi-police-box-dress/

Hope you can help.

Jeff

https://wordpress.org/plugins/jetpack/