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Editorial Team
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Asked: 2026-05-14T04:38:57+00:00

About three hours ago I started seeing the above error in my production server.

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About three hours ago I started seeing the above error in my production server. It comes from a call to the sanitize gem:

vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb:276:in 'load_missing_constant'
vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb:468:in `const_missing'
vendor/gems/sanitize-1.2.0/lib/sanitize.rb:91:in `clean!'
vendor/gems/sanitize-1.2.0/lib/sanitize.rb:84:in `clean'
vendor/gems/sanitize-1.2.0/lib/sanitize.rb:49:in `clean'   
app/helpers/application_helper.rb:28:in `display_none'
app/views/main/_blogs.html.erb:13:in `_run_erb_47app47views47main47_blogs46html46erb'

The error only occurs on the production server (linux), not my development machine (windows)

I tried rolling back my latest deployment but it didn’t fix it.

I’ve updated to sanitize 1.2.0 (which was the latest version brought down by gem update sanitize, though I note my host is running 1.3.6.

Can anyone provide any clues to help fix this?

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1 Answer

  1. Editorial Team

    Try downgrading to ‘1.0.8’. See the history and note the switch to using Nokogiri. If this fixes the issue, ensure you have the latest version of Sanitize, Nokogiri 1.4.1 and libxml2 2.7.2 installed.

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