MaskConver: ModuleNotFoundError: No module named 'official.vision.configs.google'

1. The entire URL of the file you are using

https://github.com/tensorflow/models/tree/master/official/projects/maskconver

2. Describe the bug

When I run train.py in maskconver, it got this issue.

3. Steps to reproduce

Follow the installation showing in https://github.com/tensorflow/models/tree/master to install and run train.py in maskconver can reproduce this error.