Call to undefined function get_parent_theme_file_uri()

Fatal error: Call to undefined function get_parent_theme_file_uri() in D:\phpStudy\PHPTutorial\WWW\wordpress\wp-content\themes\inspiro\inc\custom-header.php on line 40
主题下载启用时出现这个问题，想问一下大佬们如何解决，跪谢！！