Fatal error: Uncaught Error: Call to undefined function get_header() in /home/xs737765/sushitama.co.jp/public_html/wp-content/themes/sushitama/index.php:23 Stack trace: #0 {main} thrown in /home/xs737765/sushitama.co.jp/public_html/wp-content/themes/sushitama/index.php on line 23