Выходит ошибка simplejson.errors.JSONDecodeError, как это исправить?

[m1rasb]

Traceback (most recent call last):
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\simplejson\scanner.py", line 37, in _scan_once
nextchar = string[idx]
IndexError: string index out of range

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\temp\sale\app.py", line 11, in
print(api.balance.text)
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\SimpleQIWI\Session.py", line 80, in balance
balances = self.full_balance
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\SimpleQIWI\Session.py", line 70, in full_balance
return self._get_balance()
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\SimpleQIWI\Session.py", line 128, in get_balance
json = response.json()
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\requests\models.py", line 900, in json
return complexjson.loads(self.text, **kwargs)
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\simplejson_init.py", line 525, in loads
return _default_decoder.decode(s)
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\simplejson\decoder.py", line 370, in decode
obj, end = self.raw_decode(s)
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\simplejson\decoder.py", line 400, in raw_decode
return self.scan_once(s, idx=_w(s, idx).end())
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\simplejson\scanner.py", line 79, in scan_once
return _scan_once(string, idx)
File "C:\Users\MBEATS\AppData\Local\Programs\Python\Python39\lib\site-packages\simplejson\scanner.py", line 39, in _scan_once
raise JSONDecodeError(errmsg, string, idx)
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)