Fatal error: Uncaught Error: Call to undefined function feed_content_type() in /home/cs11497/shizuoka-shun.jp/htdocs/contents/wp-includes/feed-atom.php:8
Stack trace:
#0 {main}
thrown in /home/cs11497/shizuoka-shun.jp/htdocs/contents/wp-includes/feed-atom.php on line 8