rake aborted! uninitialized constant pkgname

ruby on rails - rake aborted! uninitialized constant Bullet -...

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...aborted abnormal: rake aborted! uninitialized constant ...

Rake aborted! uninitialized constant SimpleForm · Issue #875...

rake aborted!uninitialized constant ApplicationHelper::GravatarHelper/home/data/rails/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:27...

ruby on rails - rake aborted uninitialized constant "...

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rake aborted! uninitialized constant p...的中文翻译_百度翻译