Loading geometry from command line

Hello there,
 I just installed Netgen on my MBP.  From the command line I can open it from command line with

netgen

If I'm in the folder containing the geometries, I can open one, e.g. File -> Load Geometry -> sculpture.geo

But I cannot do this from the command line using 

netgen sculpture.geo

(netgen opens but geometry does not load). 

At this point I have not added to my bash start up file the following: export PYTHONPATH=$PYTHONPATH:/Applications/Netgen.app/Contents/Resources/lib/python3.8/site-packages:.
export NETGENDIR=/Applications/Netgen.app/Contents/MacOS
export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:$NETGENDIR
export DYLD_FRAMEWORK_PATH=$DYLD_FRAMEWORK_PATH:$NETGENDIR/../Frameworks
export PATH=$NETGENDIR:$PATH

When I do, and I again call

netgen

I get the error below. Can you provide some advice on what to do?

dyld: Library not loaded: /Library/Frameworks/Python.framework/Versions/3.8/Python  Referenced from: /Applications/Netgen.app/Contents/MacOS/netgen  Reason: image not foundzsh: abort      netgen

ALSO: are you aware that this link is broken:  ngsolve.org/docu/latest/install/gettingstarted.html

although this one works:  docu.ngsolve.org/latest/install/gettingstarted.html

Thanks!