paralleldots.popularity doesn't work

[wll969]

seems a problem of server:
Traceback (most recent call last):
File "", line 1, in
File "/home/anaconda3/envs/peter/lib/python3.6/site-packages/paralleldots/paralleldots_apis.py", line 100, in get_popularity
response = json.loads( response )
File "/home/anaconda3/envs/peter/lib/python3.6/json/init.py", line 354, in loads
return _default_decoder.decode(s)
File "/home/anaconda3/envs/peter/lib/python3.6/json/decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/home/anaconda3/envs/peter/lib/python3.6/json/decoder.py", line 357, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)