Fatal error: Uncaught Error: Call to undefined function twentynineteen_can_show_post_thumbnail() in /home/users/web01/7/0/0128307/www.general-jp.com/wp-content/themes/general/template-parts/content/content-single.php:15 Stack trace: #0 /home/users/web01/7/0/0128307/www.general-jp.com/wp-includes/template.php(706): require() #1 /home/users/web01/7/0/0128307/www.general-jp.com/wp-includes/template.php(653): load_template('/home/users/web...', false) #2 /home/users/web01/7/0/0128307/www.general-jp.com/wp-includes/general-template.php(157): locate_template(Array, true, false) #3 /home/users/web01/7/0/0128307/www.general-jp.com/wp-content/themes/general/single.php(24): get_template_part('template-parts/...', 'single') #4 /home/users/web01/7/0/0128307/www.general-jp.com/wp-includes/template-loader.php(77): include('/home/users/web...') #5 /home/users/web01/7/0/0128307/www.general-jp.com/wp-blog-header.php(19): require_once('/home/users/web...') #6 /home/users/web01/7/0/0128307/www.general-jp.com/index.php(17): require('/home/us in /home/users/web01/7/0/0128307/www.general-jp.com/wp-content/themes/general/template-parts/content/content-single.php on line 15