Error for both training and evaluation

[thom966]

Hello,
I am following the procedure you kindly provided.
However, when I try to train or evaluate the model with the provided commands, it produces an error message
from mmdet.core.anchor import build_prior_generator ImportError: cannot import name 'build_prior_generator' from 'mmdet.core.anchor' (/home/users/anaconda3/envs/open-mmlab/lib/python3.6/site-packages/mmdet/core/anchor/__init__.py)'

How to resolve this issue?

Thank you for your help in advance.