Fatal error: Uncaught Error: Call to undefined function st_is_mobile() in /home/wkxserver01/sim-web.jp/public_html/wp/wp-content/themes/wk_simweb/functions.php:934 Stack trace: #0 /home/wkxserver01/sim-web.jp/public_html/wp/wp-includes/class-wp-hook.php(288): st_body_class(Array) #1 /home/wkxserver01/sim-web.jp/public_html/wp/wp-includes/plugin.php(208): WP_Hook->apply_filters(Array, Array) #2 /home/wkxserver01/sim-web.jp/public_html/wp/wp-includes/post-template.php(826): apply_filters('body_class', Array, Array) #3 /home/wkxserver01/sim-web.jp/public_html/wp/wp-includes/post-template.php(585): get_body_class(Array) #4 /home/wkxserver01/sim-web.jp/public_html/wp/wp-includes/theme-compat/header-embed.php(32): body_class() #5 /home/wkxserver01/sim-web.jp/public_html/wp/wp-includes/template.php(722): require_once('/home/wkxserver...') #6 /home/wkxserver01/sim-web.jp/public_html/wp/wp-includes/template.php(671): load_template('/home/wkxserver...', true) #7 /home/wkxserver01/sim-web.jp/public_html/wp/wp-includes/general-templa in /home/wkxserver01/sim-web.jp/public_html/wp/wp-content/themes/wk_simweb/functions.php on line 934