Stephen S on "[Plugin: Contact Form 7] wpcf7_add_shortcode broken in latest update"

ugh, I just found the resolution in a post from a few days ago, sorry.

add_action( 'init', 'xxxxx_wpcf7_add_shortcode' );

function xxxxx_wpcf7_add_shortcode() {
wpcf7_add_shortcode('postdropdown', 'createbox', true);
}