Build: #35 failed

Job: Onezone basic failed

user is removed from group: Test case result

The below summarizes the result of the test " user is removed from group" in build 35 of Onedata Products - gui acceptance pkg - feature-VFS-4716-introduction-to-acceptance-testing - Chrome onezone basic tests.
Description
user is removed from group
Test class
gui.scenarios.test_onezone_basic
Method
test_user_is_removed_from_group
Duration
41 secs
Status
Failed (Existing Failure)

Error Log

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

    @fixture(scope='module')
>   def screens():

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-308>:2: in remove_member_from_group
    ???
tests/gui/utils/generic.py:110: in wrapper
    return fun(*args, **kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

selenium = {'browser1': <selenium.webdriver.chrome.webdriver.WebDriver (session="281edf388fb32cce9246afd9aebf8e35")>, 'browser2': <selenium.webdriver.chrome.webdriver.WebDriver (session="e92bb055be8712934151309b56cd2e26")>}
browser_id = 'browser1', name = 'user2', member_type = 'user', group = 'group1'
oz_page = <class 'tests.gui.utils.onezone.OZLoggedIn'>

    @wt(parsers.re('user of (?P<browser_id>.*) removes (?P<member_type>user|group) '
                   '"(?P<name>.*)" from group '
                   '"(?P<group>.*)" members'))
    @repeat_failed(timeout=WAIT_FRONTEND)
    def remove_member_from_group(selenium, browser_id, name, member_type, 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:279: AttributeError