Uncaught Error: Call to a member function isLogin() on null in /home/kusanagi/kusanagi_html/DocumentRoot/wp-content/themes/dokujo/single.php on line 10

• include()
  wp-includes/template-loader.php:98
• require_once()
  wp-blog-header.php:19
• require()
  index.php:17

internal_server_error 500