jenkins base url mismatch leads to unreadable errors

[Artalus]

.jenotrc: http://localhost:8080
pasted url: http://bar:8080/job/...

Traceback (most recent call last):
  File "s:\git\jenot\src\jenot\qt\processor.py", line 34, in _run
    result = run(self.jenkins_base_url, self.user, self.token, self.build_part)
  File "s:\git\jenot\src\jenot\__init__.py", line 69, in run
    result, actual_url = iterate(url, USER, TOKEN)
  File "s:\git\jenot\src\jenot\__init__.py", line 40, in iterate
    resp = requests.get(f'{url}/api/json', auth=auth).json()
  File "s:\git\Jenot\venv\lib\site-packages\requests\models.py", line 910, in json
    return complexjson.loads(self.text, **kwargs)
  File "C:\Python\39\lib\json\__init__.py", line 346, in loads
    return _default_decoder.decode(s)
  File "C:\Python\39\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Python\39\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)