Error making data set

When I used labelme to make my own data set, the following error occurred when parsing the json file: would you please help to see why

This seems to be a lableme issue and you might get better support in their GitHub.
Anyway, the error points to a missing Qt lib, so you might need to reinstall it.

I have reinstalled labelme and all the required libraries, but the following questions still appear. The imgviz module is available, thank you for your answer