Fatal error: Uncaught Error: Call to undefined function feed_content_type() in /var/www/hosts/old.aquarionics.com/htdocs/archive/wp-includes/feed-rss2.php:8
Stack trace:
#0 {main}
thrown in /var/www/hosts/old.aquarionics.com/htdocs/archive/wp-includes/feed-rss2.php on line 8