Cannot install an application for domain in Plesk: Filesystem error: boost::filesystem::remove: Permission denied

Cause

Cannot install application for the domain via Plesk (ex. Drupal):

Installation of Drupal at http://example.com/ failed. Unable to change mode for /var/www/vhosts/example.com/example-sub.com/core/assets/vendor/ckeditor/plugins/a11yhelp: Operation not permitted

Cause

Insufficient permissions/ownership inside domain’s directory.

Resolution

Note: if you don’t have root access to Plesk server via SSH, contact your hosting provider regarding the issue

Set default permissions as follows:

1. Login to Plesk > Subscriptions > example.com and determine system user for the subscription:

2. Connect to the server using SSH.

3. Run the following commands:

   Note: Substitute “johndoe” with the system user name from step #1

   # find /var/www/vhosts/example.com/httpdocs/ -type f -exec chown johndoe:psacln {} ;
   # find /var/www/vhosts/example.com/httpdocs/ -type d -exec chown johndoe:psacln {} ;