Error message

• Notice: Undefined index: und in include() (line 87 of /home/drupal7/public_html/sites/posthole.drupal7.heritech.co.uk/themes/htec_bootstrap/node--post_hole_article.tpl.php).
• Warning: count(): Parameter must be an array or an object that implements Countable in include() (line 90 of /home/drupal7/public_html/sites/posthole.drupal7.heritech.co.uk/themes/htec_bootstrap/node--post_hole_article.tpl.php).
• Notice: Trying to access array offset on value of type null in include() (line 110 of /home/drupal7/public_html/sites/posthole.drupal7.heritech.co.uk/themes/htec_bootstrap/node--post_hole_article.tpl.php).
• Notice: Trying to access array offset on value of type null in include() (line 110 of /home/drupal7/public_html/sites/posthole.drupal7.heritech.co.uk/themes/htec_bootstrap/node--post_hole_article.tpl.php).
• Warning: array_flip(): Can only flip STRING and INTEGER values! in EntityAPIController->load() (line 226 of /home/drupal7/public_html/sites/all/modules/entity/includes/entity.controller.inc).
• Warning: array_flip(): Can only flip STRING and INTEGER values! in DrupalDefaultEntityController->cacheGet() (line 391 of /home/drupal7/public_html/includes/entity.inc).
• Notice: Trying to access array offset on value of type null in include() (line 111 of /home/drupal7/public_html/sites/posthole.drupal7.heritech.co.uk/themes/htec_bootstrap/node--post_hole_article.tpl.php).
• Notice: Trying to access array offset on value of type null in include() (line 111 of /home/drupal7/public_html/sites/posthole.drupal7.heritech.co.uk/themes/htec_bootstrap/node--post_hole_article.tpl.php).
• Notice: Undefined index: in include() (line 111 of /home/drupal7/public_html/sites/posthole.drupal7.heritech.co.uk/themes/htec_bootstrap/node--post_hole_article.tpl.php).
• Notice: unserialize(): Error at offset 8222 of 9238 bytes in views_db_object->load_row() (line 2327 of /home/drupal7/public_html/sites/all/modules/views/includes/view.inc).