我在WordPress网站上发现以下错误

Warning: require(/home/[site]/public_html/wp-includes/load.php): failed to open stream: No such file or directory in /home/[site]/public_html/wp-settings.php on line 19

Warning: require(/home/[site]/public_html/wp-includes/load.php): failed to open stream: No such file or directory in /home/[site]/public_html/wp-settings.php on line 19

Fatal error: require(): Failed opening required \'/home/[site]/public_html/wp-includes/load.php\' (include_path=\'.:/usr/lib/php:/usr/local/lib/php\') in /home/[site]/public_html/wp-settings.php on line 19

我已经排除了几天的故障，但确实需要一些帮助。

File permissions:

wp设置。菲律宾比索：644

wp配置。菲律宾比索：444

wp包括：755

wp包括/负载。菲律宾比索：644

有人知道会是什么吗？我尝试过手动升级这些文件（删除旧的wp文件并进行更新），但仍然一无所获。PHP版本为7。

谢谢