UnicodeDecodeError: utf-8 codec can't decode byte 0xce in position 3: invalid continuation byte

I have installed rasa and encountered the problem – ‘utf-8’ codec can’t decode byte 0xce" ,and I try to update the rasa version to 1.6.0 ,but the problem is still here.

I use

python -m rasa_nlu.server -c sample_configs/config_jieba_mitie_sklearn.yml --path models

to start a server and post a request by this

curl -XPOST localhost:5000/parse -d "{"q":"我发烧了该吃什么药?", "model": "model_20191229-202428"}"

and I got the following error:

how could I fix it? Please ,thanks