Linux Security 64 installation to isolated environment fails with error ‚failed to find content for one or more required channels‘

Issue:

Linux Security 64 installation on a host in an isolated or offline environment fails with the error: 
" Unfinished F-Secure Linux Security 64 activation found. Restarting activation.
Preparing content for installation…
Activate: /root/withsecure-updates.zip: failed to find content for one or more required channels
Failed to activate the product! "

Resolution:

To install Linux Security 64 on an isolated host using a content package (withsecure-updates.zip), run: 

• bash linuxsecurity-pm-installer/linuxsecurity-installer –package=/PATH/TO/withsecure-updates.zip –automatic-updates=none

When creating the withsecure-updates.zip, make sure that you have the latest version of the channels.json file. If you are unsure about the version, download the latest channels.json file: 

Instructions how to create the content package for isolated Linux environments can be found in the Linux Security 64 user guide: Creating the content package for isolated environments | Linux Security 64 | Latest | WithSecure User Guides