Fatal error: Uncaught Error: Call to undefined function add_action() in /home/users/0/ryota/web/volf/wp-includes/functions.php:5391
Stack trace:
#0 /home/users/0/ryota/web/volf/wp-settings.php(81): require()
#1 /home/users/0/ryota/web/volf/wp-config.php(93): require_once('/home/users/0/r...')
#2 /home/users/0/ryota/web/volf/wp-load.php(37): require_once('/home/users/0/r...')
#3 /home/users/0/ryota/web/volf/wp-blog-header.php(13): require_once('/home/users/0/r...')
#4 /home/users/0/ryota/web/volf/index.php(22): require('/home/users/0/r...')
#5 {main}
thrown in /home/users/0/ryota/web/volf/wp-includes/functions.php on line 5391