Error message

• Notice: Trying to get property of non-object in drupal_alter() (line 1150 of /opt/bitnami/apache2/htdocs/booksya.com/booksya/includes/module.inc).
• Notice: Trying to get property of non-object in drupal_alter() (line 1150 of /opt/bitnami/apache2/htdocs/booksya.com/booksya/includes/module.inc).
• Notice: Trying to get property of non-object in drupal_alter() (line 1150 of /opt/bitnami/apache2/htdocs/booksya.com/booksya/includes/module.inc).
• Notice: Undefined index: field_book_cover in include() (line 5 of /opt/bitnami/apache2/htdocs/booksya.com/booksya/sites/all/themes/booksya_theme/node.tpl.php).
• Notice: Undefined variable: base_path in include() (line 8 of /opt/bitnami/apache2/htdocs/booksya.com/booksya/sites/all/themes/booksya_theme/node.tpl.php).
• Notice: Trying to get property of non-object in drupal_alter() (line 1150 of /opt/bitnami/apache2/htdocs/booksya.com/booksya/includes/module.inc).
• Notice: Trying to get property of non-object in drupal_alter() (line 1150 of /opt/bitnami/apache2/htdocs/booksya.com/booksya/includes/module.inc).
• Notice: Trying to get property of non-object in drupal_alter() (line 1150 of /opt/bitnami/apache2/htdocs/booksya.com/booksya/includes/module.inc).