fix

themes/visgroup/single-team.php

@@ -41,6 +41,7 @@ the_post();
                                 array(
                                     'key' => 'group_head',
                                     'value' => '"' . get_the_ID() . '"',
+                                    'compare' => 'LIKE'
                                     )
                                 )
                         );