I installed klayout separately, then opened a terminal, went to the Opanlane folder location, exported the PDK_ROOT,
and I was able to run the command "klayout -e -nn $PDK_ROOT/..." which opened a nice P&R logic design in klayout.
However, the same command gives error shown in the previous message when I try to run it inside OpenLane Container.
I am not familiar at all with such environment. Any hints?