ModuleNotFoundError: No module named 'numpy'

[ashrond]

Been getting this on a fresh install of Volumio 3, an updated version of Volumio 3 and after re-installing and then upgrading numpy.
any ideas?

volumio@volumio:~$ sudo journalctl -fu nr1uibuster.service
-- Logs begin at Thu 2019-02-14 02:11:59 PST. --
Sep 12 21:35:04 volumio nr1ui[421]: ModuleNotFoundError: No module named 'numpy'
Sep 12 21:35:04 volumio systemd[1]: nr1uibuster.service: Main process exited, code=exited, status=1/FAILURE
Sep 12 21:35:04 volumio systemd[1]: nr1uibuster.service: Failed with result 'exit-code'.
Sep 12 22:45:19 volumio systemd[1]: Started NR1-UI.
Sep 12 22:45:22 volumio nr1ui[10832]: Traceback (most recent call last):
Sep 12 22:45:22 volumio nr1ui[10832]: File "/home/volumio/NR1-UI/nr1ui.py", line 51, in
Sep 12 22:45:22 volumio nr1ui[10832]: import numpy as np
Sep 12 22:45:22 volumio nr1ui[10832]: ModuleNotFoundError: No module named 'numpy'
Sep 12 22:45:22 volumio systemd[1]: nr1uibuster.service: Main process exited, code=exited, status=1/FAILURE
Sep 12 22:45:22 volumio systemd[1]: nr1uibuster.service: Failed with result 'exit-code'.