Internal Error 500 - conflict with redmine omniauth CAS 0.1.2

[lhadjadj]

Hello, thank you for your plugin, I use the "Redmine omniauth CAS 0.1.2" at https://github.com/jbbarth/redmine_omniauth_cas, when i load "Redmine login audit", I have a Internal 500 Error, see the diary below.

If i uninstall redmine_ominauth_cas your plugin works well. i also open a issue to redmine_omniauth_cas.

Do you think you take a look to the problem ?

Thx.

Environment:
  Redmine version           3.3.9.stable
  Ruby version                 2.3.0-p0 (2015-12-25) [x86_64-linux]
  Rails version                  4.2.11
  Environment                 production
  Database adapter         Mysql2
SCM:
  Git                                 2.1.4
  Filesystem                     
Redmine plugins:
  redmine_omniauth_cas      3.3.0
  redmine_xls_export            0.2.1.t11
  sidebar_hide                      0.0.8

ActionView::Template::Error (undefined local variable or method `label_for_cas_login' for #<#Class:0x00563271334538:0x007fd105a32310> Did you mean? labelled_form_for):

The log

Processing by AccountController#login as HTML
  Current user: anonymous
  Rendered plugins/redmine_omniauth_cas/app/views/redmine_omniauth_cas/_view_account_login_top.html.erb (55.3ms)
  Rendered account/login.html.erb within layouts/base (55.7ms)
Completed 500 Internal Server Error in 58ms (ActiveRecord: 0.2ms)

ActionView::Template::Error (undefined local variable or method `label_for_cas_login' for #<#<Class:0x00563271334538>:0x007fd105a32310>
Did you mean?  labelled_form_for):
    11:     #(it happens for me at work with 2 reverse-proxies in front of the app...)
    12:     @back_url = CGI.unescape(@back_url) if @back_url && @back_url.match(/^https?%3A/)
    13:   %>
    14:   <%= link_to label_for_cas_login, :controller => "account", :action => "login_with_cas_redirect", :provider => "cas", :origin => @back_url %>
    15: </div>
    16:
    17: <% end %>
  plugins/redmine_omniauth_cas/app/views/redmine_omniauth_cas/_view_account_login_top.html.erb:14:in `_plugins_redmine_omniauth_cas_app_views_redmine_omniauth_cas__view_account_login_top_html_erb__519223562586077569_47387324155000'
  lib/redmine/hook/view_listener.rb:59:in `block (2 levels) in render_on'
  lib/redmine/hook/view_listener.rb:57:in `map'
  lib/redmine/hook/view_listener.rb:57:in `block in render_on'
  lib/redmine/hook.rb:61:in `block (2 levels) in call_hook'
  lib/redmine/hook.rb:61:in `each'
  lib/redmine/hook.rb:61:in `block in call_hook'
  lib/redmine/hook.rb:58:in `tap'
  lib/redmine/hook.rb:58:in `call_hook'
  lib/redmine/hook.rb:96:in `call_hook'
  app/views/account/login.html.erb:1:in `_app_views_account_login_html_erb__689247372787559154_47387323859960'
  lib/redmine/sudo_mode.rb:63:in `sudo_mode'