Fatal error: Uncaught Error: Call to undefined method WC_Product_Simple::get_available_variations() in /home/xs380225/adbentoboy.co.jp/public_html/milstd.adbentoboy.co.jp/wp/wp-content/themes/storefront-child/woocommerce/single-product.php:169 Stack trace: #0 /home/xs380225/adbentoboy.co.jp/public_html/milstd.adbentoboy.co.jp/wp/wp-includes/template-loader.php(106): include() #1 /home/xs380225/adbentoboy.co.jp/public_html/milstd.adbentoboy.co.jp/wp/wp-blog-header.php(19): require_once('/home/xs380225/...') #2 /home/xs380225/adbentoboy.co.jp/public_html/milstd.adbentoboy.co.jp/wp/index.php(17): require('/home/xs380225/...') #3 {main} thrown in /home/xs380225/adbentoboy.co.jp/public_html/milstd.adbentoboy.co.jp/wp/wp-content/themes/storefront-child/woocommerce/single-product.php on line 169