Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in /export/sd215/www/jp/r/e/gmoserver/6/0/sd0974960/aheadjapan.co.jp/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php:17 Stack trace: #0 /export/sd215/www/jp/r/e/gmoserver/6/0/sd0974960/aheadjapan.co.jp/wp-settings.php(248): require() #1 /export/sd215/www/jp/r/e/gmoserver/6/0/sd0974960/aheadjapan.co.jp/wp-config.php(178): require_once('/export/sd215/w...') #2 /export/sd215/www/jp/r/e/gmoserver/6/0/sd0974960/aheadjapan.co.jp/wp-load.php(37): require_once('/export/sd215/w...') #3 /export/sd215/www/jp/r/e/gmoserver/6/0/sd0974960/aheadjapan.co.jp/wp-blog-header.php(13): require_once('/export/sd215/w...') #4 /export/sd215/www/jp/r/e/gmoserver/6/0/sd0974960/aheadjapan.co.jp/index.php(17): require('/export/sd215/w...') #5 {main} thrown in /export/sd215/www/jp/r/e/gmoserver/6/0/sd0974960/aheadjapan.co.jp/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php on line 17