The automated script used Stuck. No response. It's been eight hours. (Updating apt package database and upgrading currently installed packages... )
I remember from yesterday(?) discussion the problem is popup window where installer asks what to do is not shown so installer just waits forever for the answer. From what I remember, one way to fix it was to run apt-get update ; apt-get dist-upgrade before running the automated installation. There was another fix, but I do not remember what. And can not find the forum thread now. Now I found it, was not Forum Thread but discussion in this Tutorial: https://www.howtoforge.com/tutorial/ubuntu-ispconfig-automated-install-script/