Got warning about max buttons 1 allowed after purchasing ULTRA plan

Hello,

Our customer ( http://www.solidaarisuusteot.fi ) bought an ULTRA plan of your likebtn-plugin, but we are still getting warning about Max 1 buttons allowed.

We are using the following code. I also tested synchronization with API-key and it said ok. What are we missing from this?

<?php
echo do_shortcode('[likebtn data-identifier="$post->ID" show_date="1" show_likes="1" show_dislikes="0" show_dislikes="false" share_enabled="0"]');
?>

https://wordpress.org/plugins/likebtn-like-button/