Python error

Hi,
I try run python app:
bazel run apps/samples/stereo_vo:svo_realsense

but got python error:

ModuleNotFoundError: No module named ‘numpy.core._multiarray_umath’
Traceback (most recent call last):
File “/home/csc000/.cache/bazel/_bazel_csc000/038f380f2e53273fe701b54840a66e25/execroot/com_nvidia_isaac/bazel-out/k8-opt/bin/apps/samples/stereo_vo/svo_realsense.runfiles/com_nvidia_isaac/apps/samples/stereo_vo/svo_realsense.py”, line 10, in
from engine.pyalice import Application, Node
File “/home/csc000/.cache/bazel/_bazel_csc000/038f380f2e53273fe701b54840a66e25/execroot/com_nvidia_isaac/bazel-out/k8-opt/bin/apps/samples/stereo_vo/svo_realsense.runfiles/com_nvidia_isaac/engine/pyalice/init.py”, line 15, in
from .Application import Application
File “/home/csc000/.cache/bazel/_bazel_csc000/038f380f2e53273fe701b54840a66e25/execroot/com_nvidia_isaac/bazel-out/k8-opt/bin/apps/samples/stereo_vo/svo_realsense.runfiles/com_nvidia_isaac/engine/pyalice/Application.py”, line 25, in
import quaternion
File “/home/csc000/.local/lib/python3.6/site-packages/quaternion/init.py”, line 24, in
from .numpy_quaternion import (
ImportError: numpy.core.multiarray failed to import

Installed 2020NX.1 version on Ubuntu 18.04.
All c++ modules working well.