Traceback (most recent call last):
File "c:\vnstudio\lib\site-packages\vnstation\cli.py", line 92, in run_trader
main_engine.add_app(app)
File "c:\vnstudio\lib\site-packages\vnpy\trader\engine.py", line 96, in add_app
engine = self.add_engine(app.engine_class)
File "c:\vnstudio\lib\site-packages\vnpy\trader\engine.py", line 71, in add_engine
engine = engine_class(self, self.event_engine)
File "c:\vnstudio\lib\site-packages\vnpy\app\option_master\engine.py", line 75, in init
self.load_setting()
File "c:\vnstudio\lib\site-packages\vnpy\app\option_master\engine.py", line 85, in load_setting
self.setting = load_json(self.setting_filename)
File "c:\vnstudio\lib\site-packages\vnpy\trader\utility.py", line 99, in load_json
data = json.load(f)
File "c:\vnstudio\lib\json__init.py", line 296, in load
parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
File "c:\vnstudio\lib\json\init__.py", line 348, in loads
return _default_decoder.decode(s)
File "c:\vnstudio\lib\json\decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "c:\vnstudio\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)
