enabling theme

[sai krishna]

I am trying to configure a theme for lms and when  I run paver devstack  lms I am facing the error like



Traceback (most recent call last):
  File "manage.py", line 111, in <module>
    startup = importlib.import_module(edx_

args.startup)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/edx/app/edxapp/edx-platform/lms/startup.py", line 12, in <module>
    settings.INSTALLED_APPS  # pylint: disable=pointless-statement
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/conf/__init__.py", line 48, in __getattr__
    self._setup(name)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/conf/__init__.py", line 44, in _setup
    self._wrapped = Settings(settings_module)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/conf/__init__.py", line 92, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/edx/app/edxapp/edx-platform/lms/envs/devstack.py", line 6, in <module>
    from .aws import *  # pylint: disable=wildcard-import, unused-wildcard-import
  File "/edx/app/edxapp/edx-platform/lms/envs/aws.py", line 119, in <module>
    ENV_TOKENS = json.load(env_file)
  File "/usr/lib/python2.7/json/__init__.py", line 291, in load
    **kw)
  File "/usr/lib/python2.7/json/__init__.py", line 339, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 367, in decode
    raise ValueError(errmsg("Extra data", s, end, len(s)))
ValueError: Extra data: line 1 column 3 - line 621 column 1 (char 2 - 22812)

plz help to resolve this issue