uninitialized constant Loofah::Helpers
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/loofah-2.0.0/lib/loofah/instance_methods.rb:116:in `to_text'
/var/www/redmine/app/models/mail_handler.rb:414:in `block in plain_text_body'
/var/www/redmine/app/models/mail_handler.rb:409:in `map'
/var/www/redmine/app/models/mail_handler.rb:409:in `plain_text_body'
/var/www/redmine/app/models/mail_handler.rb:312:in `get_keyword'
/var/www/redmine/app/models/mail_handler.rb:363:in `issue_attributes_from_keywords'
/var/www/redmine/app/models/mail_handler.rb:186:in `receive_issue'
/var/www/redmine/plugins/redmine_helpdesk/lib/mail_handler_patch.rb:17:in `dispatch_to_default_with_helpdesk'
/var/www/redmine/app/models/mail_handler.rb:159:in `dispatch'
/var/www/redmine/app/models/mail_handler.rb:134:in `receive'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/actionmailer-3.2.15/lib/action_mailer/base.rb:404:in `block in receive'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/activesupport-3.2.15/lib/active_support/notifications.rb:123:in `block in instrument'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/activesupport-3.2.15/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/activesupport-3.2.15/lib/active_support/notifications.rb:123:in `instrument'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/actionmailer-3.2.15/lib/action_mailer/base.rb:401:in `receive'
/var/www/redmine/app/models/mail_handler.rb:46:in `receive'
/var/www/redmine/lib/redmine/imap.rb:35:in `block in check'
/var/www/redmine/lib/redmine/imap.rb:32:in `each'
/var/www/redmine/lib/redmine/imap.rb:32:in `check'
/var/www/redmine/lib/tasks/email.rake:125:in `block (3 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-2.0.0-p353/bin/ruby_executable_hooks:15:in `eval'
/usr/local/rvm/gems/ruby-2.0.0-p353/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => redmine:email:receive_imap
(See full trace by running task with --trace)