Build: #19 failed

Job: Onezone basic failed

user tries to view group after leaving it: Test case result

The below summarizes the result of the test " user tries to view group after leaving it" in build 19 of Onedata Products - gui acceptance pkg - feature-VFS-4716-introduction-to-acceptance-testing - Chrome onezone basic tests.
Description
user tries to view group after leaving it
Test class
gui.scenarios.test_onezone_basic
Method
test_user_tries_to_view_group_after_leaving_it
Duration
32 secs
Status
Failed (Existing Failure)

Error Log

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

    scenarios('../features/onezone/groups/groups_join.feature')
>   scenarios('../features/onezone/groups/'
              'groups_multiple_users_with_single_group.feature')

tests/gui/scenarios/test_onezone_basic.py:73: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/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 = {'browser': <selenium.webdriver.chrome.webdriver.WebDriver (session="aff38d037c3e11b3a017c452362ed9a4")>}
browser_id = 'browser', 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