## 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.