Error Thrown When Creating Account

[jasonrogena]

The following error is thrown when creating an account. Issue affects v1.14.6:

ERROR 2018-09-03 07:40:23,026 exception 31485 140183367087936 Internal Server Error: /api/v1/profiles
Traceback (most recent call last):
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/rest_framework/viewsets.py", line 103, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/rest_framework/views.py", line 483, in dispatch
    response = self.handle_exception(exc)
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/rest_framework/views.py", line 443, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/rest_framework/views.py", line 480, in dispatch
    response = handler(request, *args, **kwargs)
  File "./onadata/apps/api/viewsets/user_profile_viewset.py", line 151, in create
    data['metadata'] = {'last_password_edit': timezone.now().isoformat()}
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/django/http/request.py", line 434, in __setitem__
    self._assert_mutable()
  File "/home/onadata/.virtualenvs/onadata/local/lib/python2.7/site-packages/django/http/request.py", line 431, in _assert_mutable
    raise AttributeError("This QueryDict instance is immutable")
AttributeError: This QueryDict instance is immutable

Aha! Link: https://ona.aha.io/features/PROD-322