Fatal error: Uncaught Error: Call to a member function getModel() on null in /home/c3298768/public_html/atom-group.jp/wp-content/plugins/digital-publications-by-supsystic/modules/book/models/book.php:18 Stack trace: #0 /home/c3298768/public_html/atom-group.jp/wp-content/plugins/digital-publications-by-supsystic/modules/book/models/book.php(9): bookModelDps->_afterGet(Object(WP_Term), true, '') #1 /home/c3298768/public_html/atom-group.jp/wp-content/plugins/digital-publications-by-supsystic/modules/book/views/book.php(6): bookModelDps->getById(10, true, false, 'id', '') #2 /home/c3298768/public_html/atom-group.jp/wp-content/plugins/digital-publications-by-supsystic/modules/book/mod.php(47): bookViewDps->getBookHtml(Array, '') #3 /home/c3298768/public_html/atom-group.jp/wp-includes/shortcodes.php(319): bookDps->displayBook(Array, '', 'publication_sup...') #4 [internal function]: do_shortcode_tag(Array) #5 /home/c3298768/public_html/atom-group.jp/wp-includes/shortcodes.php(197): preg_replace_callback('/\\[(\\[?)(public...', ' in /home/c3298768/public_html/atom-group.jp/wp-content/plugins/digital-publications-by-supsystic/modules/book/models/book.php on line 18