internal error

redmine 500 internal error vendor/plugins/redmine_autohier/app/helpers/application_helper.rb:40:in `breadcrumb’. autohier

При нажатии в задаче трекера redmine на “Затраченное время:” выдало ошибку 500 internal error.
в логах redmine log/production.log:

Processing TimelogController#index (for 111.111.111.111 at 2011-10-22 11:22:24) [GET]
Parameters: {“issue_id”=>”222”, “project_id”=>”project”, “action”=>”index”, “controller”=>”timelog”}
Rendering template within layouts/base
Rendering timelog/index
ActionView::TemplateError (undefined method `short_title’ for nil:NilClass) on line #5 of app/views/timelog/index.html.erb:
2: <%= link_to_if_authorized l(:button_log_time), {:controller => ‘timelog’, :action => ‘new’, :project_id => @project, :issue_id => @issue}, :class => ‘icon icon-time-add’ %>
3:
4:
5: <%= render_timelog_breadcrumb %>
6:
7:
8:
vendor/plugins/redmine_autohier/app/helpers/application_helper.rb:40:in `breadcrumb’
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