Some of you might have noticed that as of version 4.8, the built-in hook hook for awarding points has stopped working. If you have updated to version 4.9, you can restore support by adding the following code snippet to your functions.php file:
add_filter( 'wpcf7_verify_nonce', '__return_true' );
Alternatively you can enable the “Subscribers-Only Mode” in Contact Form 7 to get this working.
You can read more about this in the Contact Form 7 documentation.