When you try to create or modify FTP users in cPanel, you receive error:
[wpfmb type=’error’ theme=2]Error:Could not edit/home/username/etc/ftpquota[/wpfmb]
Check ownership/permission set on ftpquota :
/home/username/etc/ftpquota
It should be like username:mail /home/username/etc/
File “ftpquota” should have username:username permission.