title: Unfortunately, an unexpected error occurred, and Bundler cannot continue.! what is it mean?
body: <pre><code>C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:68: warning: already initialized constant Win32::WCHAR
  C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:68: warning: previous definition of WCHAR was here
  C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:69: warning: already initialized constant Win32::WCHAR_NUL
  C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:69: warning: previous definition of WCHAR_NUL was here
  C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:70: warning: already initialized constant Win32::WCHAR_CR
  C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:70: warning: previous definition of WCHAR_CR was here
  C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:71: warning: already initialized constant Win32::WCHAR_SIZE
  C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:71: warning: previous definition of WCHAR_SIZE was here
  </code></pre>
  <p>I ran the command <code>C:/RailsInstaller/Ruby2.3.3/bin/bundle update</code></p>
  <p>Backtrace:</p>
  <pre><code>ArgumentError: unknown encoding name - CP720
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:72:in `find'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:72:in `&lt;module:Win32&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/registry.rb:4:in `&lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/win32/resolv.rb:7:in `&lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/resolv.rb:172:in `&lt;class:Hosts&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/resolv.rb:169:in `&lt;class:Resolv&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/resolv.rb:39:in `&lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/remote_fetcher.rb:7:in `&lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/spec_fetcher.rb:2:in `&lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/dependency_installer.rb:6:in `&lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/installer.rb:3:in `&lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/cli/update.rb:50:in `run'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/cli.rb:231:in `update'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/vendor/thor/lib/thor.rb:369:in `dispatch'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/cli.rb:22:in `dispatch'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/vendor/thor/lib/thor/base.rb:444:in `start'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/cli.rb:13:in `start'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/exe/bundle:30:in `block in &lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/friendly_errors.rb:121:in `with_friendly_errors'
    C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/exe/bundle:22:in `&lt;top (required)&gt;'
    C:/RailsInstaller/Ruby2.3.3/bin/bundle:22:in `load'
    C:/RailsInstaller/Ruby2.3.3/bin/bundle:22:in `&lt;main&gt;'
  </code></pre>
  <h2>Environment</h2>
  <pre><code>Bundler   1.15.3
  Rubygems  2.5.2
  Ruby      2.3.3p222 (2016-11-21 revision 56859) [i386-mingw32]
  GEM_HOME  C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0
  GEM_PATH  C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0;C:/Users/User/.gem/ruby/2.3.0
  Git       2.28.0.windows.1
  Platform  x86-mingw32
  OpenSSL   OpenSSL 1.0.2j  26 Sep 2016
  </code></pre>
  <p>Gemfile:</p>
  <pre class="lang-rb prettyprint-override"><code>source 'https://rubygems.org'
  
  git_source(:github) do |repo_name|
    repo_name = &quot;#{repo_name}/#{repo_name}&quot; unless repo_name.include?(&quot;/&quot;)
    &quot;https://github.com/#{repo_name}.git&quot;
  end
  
  
  # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
  gem 'rails', '~&gt; 5.1.3'
  # Use sqlite3 as the database for Active Record
  gem 'sqlite3'
  # Use Puma as the app server
  gem 'puma', '~&gt; 3.7'
  # Use SCSS for stylesheets
  gem 'sass-rails', '~&gt; 5.0'
  # Use Uglifier as compressor for JavaScript assets
  gem 'uglifier', '&gt;= 1.3.0'
  # See https://github.com/rails/execjs#readme for more supported runtimes
  # gem 'therubyracer', platforms: :ruby
  
  # Use CoffeeScript for .coffee assets and views
  gem 'coffee-rails', '~&gt; 4.2'
  # Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
  gem 'turbolinks', '~&gt; 5'
  # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
  gem 'jbuilder', '~&gt; 2.5'
  # Use Redis adapter to run Action Cable in production
  # gem 'redis', '~&gt; 3.0'
  # Use ActiveModel has_secure_password
  # gem 'bcrypt', '~&gt; 3.1.7'
  
  # Use Capistrano for deployment
  # gem 'capistrano-rails', group: :development
  
  group :development, :test do
    # Call 'byebug' anywhere in the code to stop execution and get a debugger console
    gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
    # Adds support for Capybara system testing and selenium driver
    gem 'capybara', '~&gt; 2.13'
    gem 'selenium-webdriver'
  end
  
  group :development do
    # Access an IRB console on exception pages or by using &lt;%= console %&gt; anywhere in the code.
    gem 'web-console', '&gt;= 3.3.0'
  end
  
  # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
  gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
  </code></pre>