Hi @xvgt,
I believe your analysis is correct, it seems to be a numpy / Cython issue on your platform.
Can you run ZED_Diagnostic and send the resulting JSON file? This will allow me to check your SDK and Jetpack versions.
Trying with the numpy version you’ve found is a good lead, however you have mixed up the wheel that you are supposed to install which does not match your platform, in your second message.
The one you want to install is pyzed-4.1-cp36-cp36m-linux_aarch64.whl, not the x86_64 equivalent.
Please try:
/usr/bin/python3.6 -m pip install --ignore-installed /usr/local/zed/pyzed-4.1-cp36-cp36m-linux_aarch64.whl --no-deps