Nevermind I was able to solved it now, for some reason it took a while to refresh the changes.
Agrega esto manualmente dentro del macro:
I haved added into the Templates Macros, under message_macros → macro message_user_info,
Code:
<dl class="pairs pairs--justified">
<dt>Mensajes</dt>
<dd>{$user.message_count}</dd>
</dl>