error

Process Process-21:
Traceback (most recent call last):
  File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python2.7/dist-packages/salt/client/ssh/__init__.py", line 248, in handle_routine
    stdout, stderr = single.run()
  File "/usr/lib/python2.7/dist-packages/salt/client/ssh/__init__.py", line 424, in run
    stdout, stderr = self.run_wfunc()
  File "/usr/lib/python2.7/dist-packages/salt/client/ssh/__init__.py", line 463, in run_wfunc
    default_opts = pre_wrapper['test.opts_pkg']()
  File "/usr/lib/python2.7/dist-packages/salt/client/ssh/wrapper/__init__.py", line 61, in caller
    ret = json.loads(stdout, object_hook=salt.utils.decode_dict)
  File "/usr/lib/python2.7/json/__init__.py", line 351, in loads
    return cls(encoding=encoding, **kw).decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python2.7/json/decoder.py", line 384, in raw_decode
    raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded