Fatal error: Uncaught ArgumentCountError: Too few arguments to function relate_product(), 0 passed in /www/wwwroot/liyuan/wp-content/themes/liyuan/single_product.php on line 47 and exactly 1 expected in /www/wwwroot/liyuan/wp-content/themes/liyuan/config.php:307 Stack trace: #0 /www/wwwroot/liyuan/wp-content/themes/liyuan/single_product.php(47): relate_product() #1 /www/wwwroot/liyuan/wp-includes/template-loader.php(106): include('/www/wwwroot/li...') #2 /www/wwwroot/liyuan/wp-blog-header.php(19): require_once('/www/wwwroot/li...') #3 /www/wwwroot/liyuan/index.php(17): require('/www/wwwroot/li...') #4 {main} thrown in /www/wwwroot/liyuan/wp-content/themes/liyuan/config.php on line 307