The first thing I would try is just using pip to reinstall llbase
and seeing if that works. Note that pip and pip3 are different
things and work on different directory trees.
If that doesn't help, you can ignore the system installation by
installing a "user install" of python, instructions here:
https://docs.python-guide.org/starting/install/osx/
Alternatively, one can abandon the mac system altogether and do
one's work in a virtual environment or a docker container, which
isolate your work environment from the mac setup. I prefer
containers because the walls are stronger and safer, but lots of
people like venvs.
Best,
coyot