Redmine

I got error after installing plugin in redmine 2.6.5

Started GET "/my/account" for 127.0.0.1 at 2015-05-14 10:10:33 +0200
Processing by MyController#account as HTML
  Current user: ppo (id=95)
  Rendered users/_mail_notifications.html.erb (92.3ms)
  Rendered users/_preferences.html.erb (423.4ms)
  Rendered my/_sidebar.html.erb (16.9ms)
  Rendered my/account.html.erb within layouts/base (643.2ms)
Completed 500 Internal Server Error in 657.1ms

ActionView::Template::Error (undefined method `checkViewPermission' for #<Object:0xc1c3638>):
    22: <div id="top-menu">
    23:     <div id="account">
    24:         <%= render_menu :account_menu -%>
    25:     </div>
    26:     <%= content_tag('div', "#{l(:label_logged_as)} #{link_to_user(User.current, :format => :username)}".html_safe, :id => 'loggedas') if User.current.logged? %>
    27:     <%= render_menu :top_menu if User.current.logged? || !Setting.login_required? -%>
    28: </div>
  lib/redmine/menu_manager.rb:199:in `call'
  lib/redmine/menu_manager.rb:199:in `allowed_node?'
  lib/redmine/menu_manager.rb:166:in `block in menu_items_for'
  lib/redmine/menu_manager.rb:165:in `each'
  lib/redmine/menu_manager.rb:165:in `menu_items_for'
  lib/redmine/menu_manager.rb:90:in `render_menu'
  app/views/layouts/base.html.erb:25:in `_app_views_layouts_base_html_erb__565989738_99906490'

Time & Expense 1.8.1 is compatible with Redmine 3.0.x
Time & Expense 1.7 is compatible with Redmine 2.5.x