更新Wordpress主题时如何解决chmod错误？

Question

我最近从php 5升级到7.2，而我的wp网站无法正常工作，服务暂时不可用。因此，我登录到后端，WP 5.4告诉我需要检查安全问题，我已自动解决了3个问题中的2个，但不能解决“限制访问文件和文件夹”的1个问题。因此，我尝试更新2017年主题，当我这样做时，我得到了很多（尽管有相同的错误）：

Selected items were updated with errors:
- Unable to update theme 'twentyseventeen_1.7_1_', details: PHP Warning:  chmod(): Operation not permitted in /var/www/vhosts/santiapps.com/httpdocs/wordpress_2/wp-admin/includes/class-wp-filesystem-direct.php on line 168
Warning: chmod(): Operation not permitted in /var/www/vhosts/santiapps.com/httpdocs/wordpress_2/wp-admin/includes/class-wp-filesystem-direct.php on line 168
PHP Warning:  chmod(): Operation not permitted in /var/www/vhosts/santiapps.com/httpdocs/wordpress_2/wp-admin/includes/class-wp-filesystem-direct.php on line 168
Warning: chmod(): Operation not permitted in /var/www/vhosts/santiapps.com/httpdocs/wordpress_2/wp-admin/includes/class-wp-filesystem-direct.php on line 168...

并且在结尾处显示：

Warning: The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions. "front-page.php, rtl.css, 404.php...

然后最后它当然不会更新。 Wordpress Toolkit在plesk上的建议是：

我正在使用filezilla并更改对那些文件的权限，但是我得到“不允许操作”。

Answer 1

[已解决]（至少对我来说）

在Cloudway和Digital Ocean上也是我。

只需重新启动服务器，错误就消失了。