Fatal error: Uncaught Error: Call to undefined function get_post_thumbnail() in /home/c5787852/public_html/chiyodakan.jp/wp-content/themes/chiyoda/template-parts/post/content.php:39 Stack trace: #0 /home/c5787852/public_html/chiyodakan.jp/wp-includes/template.php(812): require() #1 /home/c5787852/public_html/chiyodakan.jp/wp-includes/template.php(745): load_template('/home/c5787852/...', false, Array) #2 /home/c5787852/public_html/chiyodakan.jp/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) #3 /home/c5787852/public_html/chiyodakan.jp/wp-content/themes/chiyoda/archive.php(40): get_template_part('template-parts/...', '') #4 /home/c5787852/public_html/chiyodakan.jp/wp-includes/template-loader.php(106): include('/home/c5787852/...') #5 /home/c5787852/public_html/chiyodakan.jp/wp-blog-header.php(19): require_once('/home/c5787852/...') #6 /home/c5787852/public_html/chiyodakan.jp/index.php(17): require('/home/c5787852/...') #7 {main} thrown in /home/c5787852/public_html/chiyodakan.jp/wp-content/themes/chiyoda/template-parts/post/content.php on line 39