Failure to activate Matlab after successfully installing it on Linux non-interactively (no display)

I am trying to install Matlab on a Linux machine without any display, which looked successful as per the installation log file.

However, it seems it cannot be activated. Can someone please suggest a solution because being an uninitiated user I do not fully understand the follow-up options?

Important point to note: the Linux machine cannot be connected to internet.

Regards

[Walter Roberson]

See https://www.mathworks.com/matlabcentral/answers/326707-activation-still-required-after-silent-activation-succeeded-matlab-r2016b#answer_311418