Build: #19 failed

Job: Onezone basic failed

user leaves group with more users: Test case result

The below summarizes the result of the test " user leaves group with more users" in build 19 of Onedata Products - gui acceptance pkg - feature-VFS-4716-introduction-to-acceptance-testing - Chrome onezone basic tests.
Description
user leaves group with more users
Test class
gui.scenarios.test_onezone_basic
Method
test_user_leaves_group_with_more_users
Duration
39 secs
Status
Failed (Existing Failure)

Error Log

AttributeError: 'NoneType' object has no attribute 'elements_list'
request = <FixtureRequest for <Function 'test_user_leaves_group_with_more_users'>>

    
>   @pytest.mark.skip('it collides with deregister provider test, '
                      'so skip it on getting started for now)')
    @scenario('../features/onezone/providers.feature',
              'User sees that when no provider is working appropriate msg is shown')
    def test_user_sees_that_when_no_provider_is_working_appropriate_msg_is_shown():

tests/gui/scenarios/test_onezone_basic.py:57: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/local/lib/python2.7/dist-packages/pytest_bdd/scenario.py:195: in _execute_scenario
    _execute_step_function(request, scenario, step, step_func)
/usr/local/lib/python2.7/dist-packages/pytest_bdd/scenario.py:137: in _execute_step_function
    step_func(**kwargs)
<decorator-gen-254>:2: in leave_group
    ???
tests/gui/utils/generic.py:110: in wrapper
    return fun(*args, **kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

selenium = {'browser1': <selenium.webdriver.chrome.webdriver.WebDriver (session="64a550c9d97de34824407b97ac2322ba")>, 'browser2': <selenium.webdriver.chrome.webdriver.WebDriver (session="cde71a5671ce5afb863b964460d33a92")>}
browser_id = 'browser2', group = 'group1'
oz_page = <class 'tests.gui.utils.onezone.OZLoggedIn'>

    @wt(parsers.parse('user of {browser_id} leaves group "{group}"'))
    @repeat_failed(timeout=WAIT_FRONTEND)
    def leave_group(selenium, browser_id, group, oz_page):
        page = oz_page(selenium[browser_id])['groups']
>       page.elements_list[group]()
E       AttributeError: 'NoneType' object has no attribute 'elements_list'

tests/gui/steps/onezone/groups.py:75: AttributeError