uninitialized constant HTML::Pipeline::SanitizationFilter::WHITELIST (NameError)

Question

I can't seem to find this specific error anywhere on this site for solutions, hope someone can please assist. This is the error I run into when I run rails s:

➜  conquered_self git:(352_space_time_empires) ✗ rails s
Top level ::CompositeIO is deprecated, require 'multipart/post' and use `Multipart::Post::CompositeReadIO` instead!
Top level ::Parts is deprecated, require 'multipart/post' and use `Multipart::Post::Parts` instead!
Traceback (most recent call last):
    31: from bin/rails:3:in `<main>'
    30: from bin/rails:3:in `load'
    29: from /Users/buddha/Documents/conquered_self/bin/spring:14:in `<top (required)>'
    28: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in `require'
    27: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in `require'
    26: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
    25: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
    24: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/spring-2.0.2/bin/spring:49:in `<top (required)>'
    23: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
    22: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
    21: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call'
    20: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load'
    19: from /Users/buddha/Documents/conquered_self/bin/rails:9:in `<top (required)>'
    18: from /Users/buddha/Documents/conquered_self/bin/rails:9:in `require'
    17: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands.rb:18:in `<top (required)>'
    16: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
    15: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:85:in `server'
    14: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:85:in `tap'
    13: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:88:in `block in server'
    12: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:88:in `require'
    11: from /Users/buddha/Documents/conquered_self/config/application.rb:7:in `<top (required)>'
    10: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler.rb:174:in `require'
     9: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:58:in `require'
     8: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:58:in `each'
     7: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:69:in `block in require'
     6: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:69:in `each'
     5: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:74:in `block (2 levels) in require'
     4: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:74:in `require'
     3: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/thredded-0.9.4/lib/thredded.rb:40:in `<top (required)>'
     2: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/thredded-0.9.4/lib/thredded/content_formatter.rb:2:in `<top (required)>'
     1: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/thredded-0.9.4/lib/thredded/content_formatter.rb:4:in `<module:Thredded>'
/Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/thredded-0.9.4/lib/thredded/content_formatter.rb:8:in `<class:ContentFormatter>': uninitialized constant HTML::Pipeline::SanitizationFilter::WHITELIST (NameError)

This is my Gemfile:

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end

gem 'bitfields', "~> 0.8.0"
gem 'bootstrap', '~> 4.0.0.beta'
gem 'braintree', "~> 2.70.0"
gem 'ckeditor', "~> 4.2.4"
gem 'coffee-rails', '~> 4.2.2'
gem 'devise', "~> 4.6.2"
gem 'devise_masquerade', "~> 0.6.5"
gem 'dragonfly', "~> 1.1.3"
gem 'dragonfly-s3_data_store', "~> 1.3.0"
gem 'exception_notification', "~> 4.2.2"
gem 'execjs', "~> 2.7.0"
gem 'figaro', "~> 1.1.1"
gem 'icalendar', "~> 2.4.1"
gem 'jbuilder', '~> 2.7.0'
gem 'jquery-rails', "~> 4.3.1"
gem 'listen', '~> 3.0.8'
gem 'mandrill_dm'
gem 'meta-tags', "~> 2.6.0"
gem 'mysql2', "~> 0.4.9"
gem 'omniauth-facebook', "~> 5.0.0"
gem 'omniauth-google-oauth2', "~> 0.5.2"
gem 'phony', "~> 2.15.48"
gem 'popper_js', "~> 1.11.1"
gem 'pundit', "~> 1.1.0"
gem 'rails', '~> 5.0.6'
gem 'rails_engine_decorators', git: 'https://github.com/HelloThisIsMartha/rails_engine_decorators'
gem 'react-rails', "~> 2.4.7"
gem 'redis-rails', "~> 5.0.2"
gem 'request_store', "~> 1.3.2"
gem 'rinku', "~> 2.0.3"
gem 'roman-numerals', "~> 0.3.0"
gem 'sass-rails', '~> 5.0.6'
gem 'sidekiq', "~> 5.0.4"
gem 'textris', "~> 0.4.4"
gem 'mini_racer'
gem 'thredded', '~> 0.9.4'
gem "timecop", "~> 0.9.4"
gem 'twilio-ruby', "~> 5.2.3"
gem 'uglifier', '~> 3.2.0'
gem 'websocket-driver', "~> 0.6.5"
gem 'whenever', "~> 0.9.7", :require => false

# Boostrap 4 alpha requires assets tether
source 'https://rails-assets.org' do
  gem 'rails-assets-tether', '~> 1.4.0'
end

group :staging, :production, :devasprod do
  gem 'puma', '~> 3.12.6'
  gem 'puma_worker_killer', "~> 0.1.0"
end

group :staging, :production do
  gem 'newrelic_rpm', "~> 4.0.0.332"
end

group :development, :test, :staging do
  gem 'byebug', "~> 9.1.0", platform: :mri
  gem 'pry-rails', "~> 0.3.6"
  gem 'pry-byebug', "~> 3.5.0"
  gem 'rspec-rails', '~> 3.6.1'
end

group :development do
  gem 'mailcatcher', "~> 0.2.4"
  gem 'pry-rescue', "~> 1.4.5"
  gem 'pry-stack_explorer', "~> 0.4.9.2"
  gem 'rubocop-rails', "~> 2.3.2"
  gem 'spring', "~> 2.0.2"
  gem 'spring-watcher-listen', '~> 2.0.1'
  gem 'web-console', '~> 3.5.1'
end

group :test do
  gem 'database_cleaner', "~> 1.6.1"
  gem 'factory_girl_rails', "~> 4.8.0"
end

group :development do
  gem 'flamegraph', "~> 0.9.5"
  gem 'memory_profiler', "~> 0.9.8"
  gem 'rack-mini-profiler', "~> 0.10.5"
  gem 'stackprof', "~> 0.2.10"
end

Rails and Ruby versions:

➜  conquered_self git:(352_space_time_empires) ✗ ruby -v
ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-darwin21]
➜  conquered_self git:(352_space_time_empires) ✗ rails -v
Rails 5.0.7.2

Btw, I tried the suggestions mentioned here and added the gem 'faraday-multipart' to my gemfile, ran bundle, then rail s gave me a different error:

➜  conquered_self git:(352_space_time_empires) ✗ rails s
Traceback (most recent call last):
    15: from bin/rails:9:in `<main>'
    14: from bin/rails:9:in `require'
    13: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands.rb:18:in `<top (required)>'
    12: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
    11: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:85:in `server'
    10: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:85:in `tap'
     9: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:88:in `block in server'
     8: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:88:in `require'
     7: from /Users/buddha/Documents/conquered_self/config/application.rb:7:in `<top (required)>'
     6: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler.rb:174:in `require'
     5: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:58:in `require'
     4: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:58:in `each'
     3: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:69:in `block in require'
     2: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:69:in `each'
     1: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:74:in `block (2 levels) in require'
/Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:74:in `require': cannot load such file -- faraday-multipart (LoadError)
    19: from bin/rails:9:in `<main>'
    18: from bin/rails:9:in `require'
    17: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands.rb:18:in `<top (required)>'
    16: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
    15: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:85:in `server'
    14: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:85:in `tap'
    13: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:88:in `block in server'
    12: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:88:in `require'
    11: from /Users/buddha/Documents/conquered_self/config/application.rb:7:in `<top (required)>'
    10: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler.rb:174:in `require'
     9: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:58:in `require'
     8: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:58:in `each'
     7: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:65:in `block in require'
     6: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:88:in `rescue in block in require'
     5: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/2.7.0/bundler/runtime.rb:88:in `require'
     4: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/faraday-multipart-1.0.4/lib/faraday/multipart.rb:6:in `<top (required)>'
     3: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/faraday-multipart-1.0.4/lib/faraday/multipart.rb:6:in `require_relative'
     2: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/faraday-multipart-1.0.4/lib/faraday/multipart/middleware.rb:5:in `<top (required)>'
     1: from /Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/faraday-multipart-1.0.4/lib/faraday/multipart/middleware.rb:6:in `<module:Faraday>'
/Users/buddha/.rbenv/versions/2.7.2/lib/ruby/gems/2.7.0/gems/faraday-multipart-1.0.4/lib/faraday/multipart/middleware.rb:8:in `<module:Multipart>': uninitialized constant Faraday::Request (NameError)

Answer 1

faraday / faraday-multipart:

If you didn't have these gems before, they aren't the issue and you don't need to add them.

$ gem uninstall faraday
$ gem uninstall faraday-multipart

Also, faraday-multipart didn't actually install (or didn't install correctly) as can be seen from the middle of the stack trace. Try gem install faraday-multipart or make sure it's in your gemfile and then run bundle install if you really want it. Also check your Gemfile.lock to see if faraday and faraday-multipart are there.

But again, you don't seem to need faraday or faraday-multipart at all. The SO you reference talks about updating them, not adding it to an app that doesn't have them.

thredded:

The issue is coming from this gem. Specifically, line 8 of this file

You could debug this or you could upgrade this severely out-of-date gem. (you're using 0.9.4 and it's currently at 0.16.16)

better fix:

SOOO many of your gems look to be real old and out of date. Including Ruby and Rails.

If I were you, I would first update my Ruby install to 3.1.2, then my Rails gem to at least 6.0+

Next, I would either:

1. Carefully go through each gem in the Gemfile and search for it on RubyGems and upgrade the gems one by one.

2. (brute force approach) Remove all version requirements from your Gemfile, upgrade every gem at once with bundle update and see what is fixed and what is newly broken.