RhodeCode CE/EE

When running invoke tasks that runs proxy i'm getting this error.

/nix/store/pghc397q4rgsyzbw9vwszxifaw00frzd-python2.7-SQLAlchemy-0.9.9/lib/python2.7/site-packages/sqlalchemy/engine/default.py:579: SAWarning: Unicode type received non-unicodebind param value.
  param.append(processors[key](compiled_params[key]))
Traceback (most recent call last):
  File "/nix/store/bf36jzdxns5fixzyfygsb3x92275pzk7-python2.7-invoke-0.13.0/bin/.invoke-wrapped", line 12, in <module>
    sys.exit(program.run())
  File "/nix/store/bf36jzdxns5fixzyfygsb3x92275pzk7-python2.7-invoke-0.13.0/lib/python2.7/site-packages/invoke/program.py", line 270, in run
    self.execute()
  File "/nix/store/bf36jzdxns5fixzyfygsb3x92275pzk7-python2.7-invoke-0.13.0/lib/python2.7/site-packages/invoke/program.py", line 381, in execute
    executor.execute(*self.tasks)
  File "/nix/store/bf36jzdxns5fixzyfygsb3x92275pzk7-python2.7-invoke-0.13.0/lib/python2.7/site-packages/invoke/executor.py", line 113, in execute
    result = call.task(*args, **call.kwargs)
  File "/nix/store/bf36jzdxns5fixzyfygsb3x92275pzk7-python2.7-invoke-0.13.0/lib/python2.7/site-packages/invoke/tasks.py", line 111, in __call__
    result = self.body(*args, **kwargs)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-automation/tasks/generate.py", line 53, in js_i18n
    gen_js_i18n.gen_js_i18n_files(ctx)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-automation/tasks/file_generation/gen_js_i18n.py", line 96, in gen_js_i18n_files
    gen_translations(js_strings, filename_pattern)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-automation/tasks/file_generation/gen_js_i18n.py", line 68, in gen_translations
    maybe_setup_pylons_environment()
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-automation/tasks/file_generation/__init__.py", line 29, in maybe_setup_pylons_environment
    setup_pylons_environment()
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-automation/tasks/file_generation/__init__.py", line 19, in setup_pylons_environment
    return _setup_pylons_environment(config, environ)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/tests/pylons_plugin.py", line 405, in _setup_pylons_environment
    'config:' + pylons_config, relative_to=current_path)
  File "/nix/store/3287dj6vssaad5bpjn4x6rnbd2kn1wy3-python2.7-PasteDeploy-1.5.2/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 247, in loadapp
    return loadobj(APP, uri, name=name, **kw)
  File "/nix/store/3287dj6vssaad5bpjn4x6rnbd2kn1wy3-python2.7-PasteDeploy-1.5.2/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 272, in loadobj
    return context.create()
  File "/nix/store/3287dj6vssaad5bpjn4x6rnbd2kn1wy3-python2.7-PasteDeploy-1.5.2/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 710, in create
    return self.object_type.invoke(self)
  File "/nix/store/3287dj6vssaad5bpjn4x6rnbd2kn1wy3-python2.7-PasteDeploy-1.5.2/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 146, in invoke
    return fix_call(context.object, context.global_conf, **context.local_conf)
  File "/nix/store/3287dj6vssaad5bpjn4x6rnbd2kn1wy3-python2.7-PasteDeploy-1.5.2/lib/python2.7/site-packages/paste/deploy/util.py", line 55, in fix_call
    val = callable(*args, **kw)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/config/middleware.py", line 143, in make_pyramid_app
    includeme(config)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/config/middleware.py", line 241, in includeme
    **config.registry._pylons_compat_settings)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/config/middleware.py", line 79, in make_app
    config = load_environment(global_conf, app_conf)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/config/environment.py", line 163, in load_environment
    repo2db_mapper(ScmModel().repo_scan(repos_path), remove_obsolete=False)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/model/scm.py", line 225, in repo_scan
    for name, path in get_filesystem_repos(repos_path, recursive=True):
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/utils.py", line 224, in _get_repos
    scm_info = get_scm(cur_path)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/vcs/utils/helpers.py", line 62, in get_scm
    found_scms = get_scms(path)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/vcs/utils/helpers.py", line 60, in get_scms
    return [(scm, path) for scm in get_scms_for_path(path)]
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/vcs/utils/helpers.py", line 111, in get_scms_for_path
    if backend.is_valid_repository(path):
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/vcs/backends/git/repository.py", line 141, in is_valid_repository
    GitRepository(path)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/vcs/backends/git/repository.py", line 68, in __init__
    self.path, self.config, with_wire=with_wire)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/vcs/client.py", line 185, in __call__
    path, config, remote_proxy=self._proxy_factory(),
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/vcs/client.py", line 211, in __call__
    return self.getProxy(request)
  File "/mnt/hgfs/marcink-shared/workspace/rhodecode-enterprise-ce/rhodecode/lib/vcs/client.py", line 230, in getProxy
    request.add_finished_callback(self._returnProxy)
AttributeError: 'NoneType' object has no attribute 'add_finished_callback'