Find the best Barba namespace for your wordpress theme.

barba_namespace.php

<?php
  $barbaNamespace = '';

  $post_type = get_post_type();

  switch ($post_type) {
    case 'page':
      $barbaNamespace = get_query_var('pagename');
      if ( !$barbaNamespace && $id > 0 ) {
        // If a static page is set as the front page, $pagename will not be set. Retrieve it from the queried object
        $post = $wp_query->get_queried_object();
        $barbaNamespace = $post->post_name;
      }
      break;
    // here I assume you have a CPT named project, it is my most common CPT name for portfolios
    case 'project':
      $barbaNamespace = 'project';
      break;
    default:
      $barbaNamespace = 'default';
      break;
  }
?>