[NEST Users] Problems after ubuntu installed nest-3.0 built on Aug 24 2021

Hi,

After my ubuntu upgraded nest. Whenever I run a program it does not seems to identify the nest module. For example, running the twoneuron.py example gives:

Traceback (most recent call last): File "twoneurons.py", line 43, in <module> import nest.voltage_trace ModuleNotFoundError: No module named 'nest.voltage_trace'

Please solution for this? I tried remove and reinstalling and did not work. I did not try building it.

Thanks, Inton