ActionView::Template::Error未初始化的常量 TestRun

如何解决ActionView::Template::Error未初始化的常量 TestRun

在我的项目中打开网页时出现以下错误 -

ActionView::Template::Error (uninitialized constant TestRun):
    1: insert_tag renderer_for(:index)

我正在添加跟踪以找出根本原因 -

activesupport (4.2.11.3) lib/active_support/inflector/methods.rb:261:in `const_get'
activesupport (4.2.11.3) lib/active_support/inflector/methods.rb:261:in `block in constantize'
activesupport (4.2.11.3) lib/active_support/inflector/methods.rb:259:in `each'
activesupport (4.2.11.3) lib/active_support/inflector/methods.rb:259:in `inject'
activesupport (4.2.11.3) lib/active_support/inflector/methods.rb:259:in `constantize'
activesupport (4.2.11.3) lib/active_support/core_ext/string/inflections.rb:66:in `constantize'
activeadmin (1.1.0) lib/active_admin/filters/active_filter.rb:82:in `find_class'
activeadmin (1.1.0) lib/active_admin/filters/active_filter.rb:16:in `initialize'
activeadmin (1.1.0) lib/active_admin/filters/active.rb:23:in `new'
activeadmin (1.1.0) lib/active_admin/filters/active.rb:23:in `block in build_filters'
activeadmin (1.1.0) lib/active_admin/filters/active.rb:23:in `map'
activeadmin (1.1.0) lib/active_admin/filters/active.rb:23:in `build_filters'
activeadmin (1.1.0) lib/active_admin/filters/active.rb:17:in `initialize'
activeadmin (1.1.0) lib/active_admin/filters/active_sidebar.rb:13:in `new'
activeadmin (1.1.0) lib/active_admin/filters/active_sidebar.rb:13:in `block in block'
activeadmin (1.1.0) lib/active_admin/views/components/sidebar_section.rb:25:in `instance_exec'
activeadmin (1.1.0) lib/active_admin/views/components/sidebar_section.rb:25:in `build_sidebar_content'
activeadmin (1.1.0) lib/active_admin/views/components/sidebar_section.rb:13:in `build'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:30:in `block in build_tag'
arbre (1.4.0) lib/arbre/context.rb:93:in `with_current_arbre_element'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:14:in `sidebar_section'
activeadmin (1.1.0) lib/active_admin/views/pages/base.rb:132:in `block (2 levels) in build_sidebar'
activeadmin (1.1.0) lib/active_admin/views/pages/base.rb:131:in `collect'
activeadmin (1.1.0) lib/active_admin/views/pages/base.rb:131:in `block in build_sidebar'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
arbre (1.4.0) lib/arbre/context.rb:93:in `with_current_arbre_element'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
arbre (1.4.0) lib/arbre/element/builder_methods.rb:14:in `div'
activeadmin (1.1.0) lib/active_admin/views/pages/base.rb:130:in `build_sidebar'
activeadmin (1.1.0) lib/active_admin/views/pages/base.rb:78:in `block in build_page_content'

我无法找出此错误的确切原因。有人可以帮我追踪这个错误的根本原因吗？

任何形式的帮助将不胜感激。