Fatal error: Uncaught Error: Call to undefined function feed_content_type() in /var/lib/sites/site-1049/www/html/wp-includes/feed-rss2-comments.php:8
Stack trace:
#0 {main}
  thrown in /var/lib/sites/site-1049/www/html/wp-includes/feed-rss2-comments.php on line 8