以下是客服给我的解决方法:
Next time, If the owner is “root” or “httpd”, then please follow the steps
1) Log in control panel
2) Enter FTP service
3) Enable FTP (or click edit if you already enabled it)
4) Click Add near Virtual ftp-directories
5) Add directory which contents files with incorrect owners (it can be yourdomain.com/ ) and click Submit.
6) Now click on the trash icon near this directory
7) Disable Virtual FTP if you don’t need it