ActionView::Template::Error: undefined method `authored_date' for nil:NilClass
https://sentry.gitlab.net/gitlab/gitlabcom/issues/537713/
NoMethodError: undefined method `authored_date' for nil:NilClass
/opt/gitlab/embedded/service/gitlab-rails/app/views/projects/wikis/_pages_wiki_page.html.haml:5:in `_app_views_projects_wikis__pages_wiki_page_html_haml__593017300324211768_70088890279620'
%small= (s_("Last edited %{date}") % { date: time_ago_with_tooltip(wiki_page.last_version.authored_date) }).html_safe
action_view/template.rb:145:in `block in render'
view.send(method_name, locals, buffer, &block)
active_support/notifications.rb:166:in `instrument'
yield payload if block_given?
action_view/template.rb:333:in `instrument'
ActiveSupport::Notifications.instrument("#{action}.action_view", payload, &block)
action_view/template.rb:143:in `render'
instrument("!render_template") do
...
(208 additional frame(s) were not displayed)
ActionView::Template::Error: undefined method `authored_date' for nil:NilClass
ActionView::Template::Error: undefined method `authored_date' for nil:NilClass