Error on creating user and starting about superset HOT 9 CLOSED

File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/usr/local/lib/python2.7/site-packages/flask_appbuilder/security/decorators.py", line 26, in wraps
return f(self, *args, **kwargs)
File "/usr/local/panoramix/app/views.py", line 86, in datasource
form_data=request.args, view=self)
File "/usr/local/panoramix/app/viz.py", line 79, in __init__
self.df = self.bake_query()
File "/usr/local/panoramix/app/viz.py", line 168, in bake_query
client.groupby(**self.query_obj())
File "/usr/local/panoramix/app/viz.py", line 132, in query_obj
for m in ds.metrics if m.metric_name in self.metrics
File "/usr/local/panoramix/app/viz.py", line 132, in <dictcomp>
for m in ds.metrics if m.metric_name in self.metrics
File "/usr/local/panoramix/app/models.py", line 118, in json_obj
return json.loads(self.json)
File "/usr/local/lib/python2.7/json/__init__.py", line 326, in loads
return _default_decoder.decode(s)
File "/usr/local/lib/python2.7/json/decoder.py", line 366, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/local/lib/python2.7/json/decoder.py", line 384, in raw_decode
raise ValueError("No JSON object could be decoded")