You need to SSH into to your printer and install Numby.

~/klippy-env/bin/pip install -v numpy

Be patient, this package can take 10-20 minutes to install. When finished run:

sudo apt update

sudo apt install python3-numpy python3-matplotlib -y

Verify Linux SPI driver is enabled

sudo raspi-config

#3 Interface Options > P4 SPI > Yes > OK > Finish