Hi! I just tried it and it looks like the problem here is that your data includes a simple string value as its "meta", which Prodigy normally uses as a dict:
"meta":"NG"
The matcher tries to add its score to it thinking it's a dict, so that's what causes the error you see. We should add a workaround for this to prevent the error and port the meta to a dict automatically, but in the meantime, you can fix this by making the meta a dictionary with keys, e.g. like this:
"meta": {"id": "NG"}