Error message

• Warning: Cannot use a scalar value as an array in include() (line 563 of /etc/drupal7/all/themes/coursat/templates/node--noticia.tpl.php).
• Notice: Undefined index: und in include() (line 876 of /etc/drupal7/all/themes/coursat/templates/node--noticia.tpl.php).
• Warning: count(): Parameter must be an array or an object that implements Countable in include() (line 876 of /etc/drupal7/all/themes/coursat/templates/node--noticia.tpl.php).
• Notice: Undefined index: comment_node_liga_sitio_de_sitios_form in drupal_retrieve_form() (line 809 of includes/form.inc).
• Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'comment_node_liga_sitio_de_sitios_form' not found or invalid function name in drupal_retrieve_form() (line 844 of includes/form.inc).