Fatal error: Uncaught Error: Call to undefined function twentynineteen_can_show_post_thumbnail() in /home/c1487747/public_html/zeshinkai.or.jp/wp/wp-content/themes/zeshinkai/template-parts/content/content-page.php:15 Stack trace: #0 /home/c1487747/public_html/zeshinkai.or.jp/wp/wp-includes/template.php(724): require() #1 /home/c1487747/public_html/zeshinkai.or.jp/wp/wp-includes/template.php(671): load_template('/home/c1487747/...', false) #2 /home/c1487747/public_html/zeshinkai.or.jp/wp/wp-includes/general-template.php(168): locate_template(Array, true, false) #3 /home/c1487747/public_html/zeshinkai.or.jp/wp/wp-content/themes/zeshinkai/page.php(24): get_template_part('template-parts/...', 'page') #4 /home/c1487747/public_html/zeshinkai.or.jp/wp/wp-includes/template-loader.php(78): include('/home/c1487747/...') #5 /home/c1487747/public_html/zeshinkai.or.jp/wp/wp-blog-header.php(19): require_once('/home/c1487747/...') #6 /home/c1487747/public_html/zeshinkai.or.jp/index.php(17): require('/home/c1487747/...') #7 {main} thro in /home/c1487747/public_html/zeshinkai.or.jp/wp/wp-content/themes/zeshinkai/template-parts/content/content-page.php on line 15