Fatal error: Uncaught Error: Call to undefined function is_mobile() in /home/ishikawashuhan/www/wp/wp-content/themes/ishikawasyuhan/index.php:8
Stack trace:
#0 /home/ishikawashuhan/www/wp/wp-includes/template-loader.php(74): include()
#1 /home/ishikawashuhan/www/wp/wp-blog-header.php(19): require_once('/home/ishikawas...')
#2 /home/ishikawashuhan/www/wp/index.php(17): require('/home/ishikawas...')
#3 {main}
thrown in /home/ishikawashuhan/www/wp/wp-content/themes/ishikawasyuhan/index.php on line 8