Hello,
in the mean time I fixed this with ((!) additional entry (!)):
# due to parallel error:
# ZDOTDIR=$HOME
export HOME="/home/[username]"
.
That makes many things easier - as I am on Gnome, zsh is the default anyway.
“How to” is described in the forum.
A working .zshrc can be obtained by copying this file from an actual Live-USB (Gnome)
(start the Live-medium and copy file to another USB-flash-drive).