JSON parser crash while fetching "-" (dash sign) from register

[septicwolf818]

Traceback (most recent call last):
  File "D:\Python\lib\site-packages\vulcan\_vulcan.py", line 152, in _request
    return r.json()
  File "D:\Python\lib\site-packages\requests\models.py", line 897, in json
    return complexjson.loads(self.text, **kwargs)
  File "D:\Python\lib\json\__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "D:\Python\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "D:\Python\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)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\rafal\Documents\py-dzienniczek\main.py", line 20, in <module>
    klient.ustaw_ucznia(uczen)
  File "D:\Python\lib\site-packages\vulcan\_vulcan.py", line 189, in ustaw_ucznia
    self._dict = self._get_dict()
  File "D:\Python\lib\site-packages\vulcan\_vulcan.py", line 165, in _get_dict
    j = self._post("Uczen/Slowniki")
  File "D:\Python\lib\site-packages\vulcan\_vulcan.py", line 162, in _post
    return self._request("POST", endpoint, json=json, as_json=as_json, **kwargs)
  File "D:\Python\lib\site-packages\vulcan\_vulcan.py", line 154, in _request
    raise VulcanAPIException("Wystąpił błąd.")
vulcan._utils.VulcanAPIException: Wystąpił błąd.

Error occured while downloading grades data. Error ocurrs when student has a "-" (dash sign) in grades.

[kapi2289]

I've added debug logging in ab91306, can you get the version from master and see what output do you have? And tell me if this error is only in grades.

[septicwolf818]

The error no longer appears - it was most likely repaired by Vulcan. It seems that this was not an API problem. Thank you for your answer and amazing job with this API.