Unsubscribe All results in error and success message at same time

Unsubscribe All in the mass removal results in the following error, along with the success message:

Reverse for 'list_members' with arguments '(u'new.lists.araj.me',)' and keyword arguments '{}' not found. 1 pattern(s) tried: [u'postorius/lists/(?P<list_id>[^/]+)/members/(?P<role>\\w+)/$']