InstantSSH error on delete user

    Hello


    I've encountered a problem when I tried to delete a SSH user via instantSSH.


    I have the following error :


    Code
    1. An unexpected error occurred:
    4. Modules::Plugin::_executePluginAction: Couldn't remove the `/var/chroot/InstantSSH/shared_jail/var/www/virtual/xxx.xx' directory: problem unlinking /var/chroot/InstantSSH/shared_jail/var/www/virtual/xxx.xx: cannot remove directory: Device or resource busy


    Distribution : debian 9.2
    iMSCP : 1.5.1
    InstantSSH : 5.0.1


    thanks