run app.py error

[jeffsui]

os: win10 education
python version: 3.7.3
env: conda
pyecharts version: 1.6.1
error message:

File "E:\code\nCoV-Map\app.py", line 44, in get_overall
    overall = update_overall()
  File "E:\code\nCoV-Map\logistic.py", line 25, in update_overall
    overall_data = json.loads(requests.get(url).text)
  File "E:\Anaconda3\lib\json\__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "E:\Anaconda3\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "E:\Anaconda3\lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

can anyone help me?

[jeffsui]

I change env without conda, run app.py again.
Got another error msg:

AttributeError: 'Timeline' object has no attribute 'dump_options_with_quotes'