With the installation of i-MSCP you add 2 files (90imscp, 01norecommend) under the folder /apt/apt.conf.d/.
The permission ist 640. But with this permission my central updater (apt-dater) does not work.
I got every time permission denied. After chmod 644 everything works fine.
Is the 640 needed?
Every other file in this folder has the permission 644.