Redmine

Hello,

I installed a fresh redmine but when i click "My account" it return "Internal error".
Other functions seems working fine except "My account". Can anyone help me with this problem?

==============================================================================
Environment:
Redmine version 2.6.0.stable
Ruby version 2.2.0-p0 (2014-12-25) [x86_64-linux]
Rails version 3.2.19
Environment production
Database adapter Mysql2
SCM:
Subversion 1.6.11
Git 1.7.1
Filesystem
Redmine plugins:
no plugin installed ==============================================================================

Log: ==============================================================================
Started GET "/my/account" for 192.168.1.1 at 2014-12-31 12:00:49 +0800
Processing by MyController#account as HTML
Current user: admin (id=1)
Rendered users/_mail_notifications.html.erb (7.3ms)
Rendered my/account.html.erb within layouts/base (15.4ms)
Completed 500 Internal Server Error in 26.1ms

ActionView::Template::Error (undefined method `name' for nil:NilClass):
8: ) >
9: </p>
10: <= content_tag 'div', :id => 'notified-projects', :style => (@user.mail_notification == 'selected' ? '' : 'display:none;') do >
11: <= render_project_nested_lists(@user.projects) do |project|
12: content_tag('label',
13: check_box_tag(
14: 'user[notified_project_ids][]',
app/helpers/application_helper.rb:268:in `render_project_nested_lists'
app/views/users/_mail_notifications.html.erb:11:in `block in app_views_users_mail_notifications_html_erb___1333829533671286220_70232890439000'
app/views/users/_mail_notifications.html.erb:10:in `_app_views_users__mail_notifications_html_erb___1333829533671286220_70232890439000'
app/views/my/account.html.erb:38:in `block in app_views_my_account_html_erb_4422682756050431360_70232890067000'
app/helpers/application_helper.rb:1056:in `labelled_form_for'
app/views/my/account.html.erb:9:in `_app_views_my_account_html_erb__4422682756050431360_70232890067000' ==============================================================================

Thanks,
Ken