Issue

FTP users created in Plesk Onyx control panel cannot upload files to some sub-folders inside httpdocs.

Permission denied. Critical file transfer error.

Resolution

The issue occurred because the affected sub-folders were created and owned by the root user. To fix the issue I restored group and ownership inside httpdocs folder to the default Plesk values:

• Navigate to: /var/www/vhosts/website.com
• Run following commands:
  chown -R <website_owner>:psacln httpdocs
  chown <website_owner>:psaserv httpdocs
  <website_owner> – Plesk / FTP user created while setting up the website.
  psacln – default Plesk group for client side website files (everything inside httpdocs folder).
  psaserv – default Plesk group for server side files and scripts (httpdocs folder).

If you messed up your virtual directory permissions, you can try to fix them by running command: plesk repair fs website.com

Normal permissions inside httpdocs should be:

Folders – 755 (Owner: read, write, execute; Group: read, execute; Everyone: read, execute)
Files – 644 (Owner: read, write; Group: read; Everyone: read)

April 2017
Plesk Onyx 17
‪CentOS Linux 7.3