Redmine

After enabling Redmine Activity Report in Project setting, settings page is not loading.
Below error thrown
I tried uninstalling plugin and still , settings page is not accessible

Started GET "/projects/online-car-booking-2017/settings" for 127.0.0.1 at 2017-12-07 17:38:45 +0530
Processing by ProjectsController#settings as HTML
  Parameters: {"id"=>"online-car-booking-2017"}
  Current user: kannan (id=1)
  Rendered projects/_form.html.erb (40.0ms)
  Rendered projects/_edit.html.erb (40.0ms)
  Rendered projects/settings/_modules.html.erb (5.0ms)
  Rendered projects/settings/_members.html.erb (21.0ms)
  Rendered projects/settings/_versions.html.erb (1.0ms)
  Rendered projects/settings/_issue_categories.html.erb (1.0ms)
  Rendered projects/settings/_wiki.html.erb (1.0ms)
  Rendered projects/settings/_repositories.html.erb (1.0ms)
  Rendered projects/settings/_activities.html.erb (11.0ms)
  Rendered plugins/redmine_activity_report/app/views/projects/settings/_activity_report.html.erb (116.0ms)
  Rendered common/_tabs.html.erb (201.0ms)
  Rendered projects/settings.html.erb within layouts/base (201.0ms)
Completed 500 Internal Server Error in 233ms (ActiveRecord: 53.0ms)

ActionView::Template::Error (undefined method `activity_report_settings' for #<Project:0x4ebf970>
Did you mean?  activity_user_ids):
    10:     <div class="box">
    11:       <p>
    12:         <%= check_box_tag 'activity_report_settings[with_subprojects]', '1',
    13:                           @project.activity_report_settings.try(:[], 'with_subprojects').present?,
    14:                           id: 'activity_report_settings_with_subprojects'
    15:         %>
    16:         <%= label_tag 'activity_report_settings[with_subprojects]', t('activity_report.settings.with_subprojects') %>
  plugins/redmine_activity_report/app/views/projects/settings/_activity_report.html.erb:13:in `block in _plugins_redmine_activity_report_app_views_projects_settings__activity_report_html_erb___311783500_29941968'
  plugins/redmine_activity_report/app/views/projects/settings/_activity_report.html.erb:7:in `_plugins_redmine_activity_report_app_views_projects_settings__activity_report_html_erb___311783500_29941968'
  app/views/common/_tabs.html.erb:17:in `block in _app_views_common__tabs_html_erb__488507942_70471260'
  app/views/common/_tabs.html.erb:16:in `each'
  app/views/common/_tabs.html.erb:16:in `_app_views_common__tabs_html_erb__488507942_70471260'
  app/helpers/application_helper.rb:345:in `render_tabs'
  app/views/projects/settings.html.erb:3:in `_app_views_projects_settings_html_erb__578251624_69255912'
  lib/redmine/sudo_mode.rb:63:in `sudo_mode'