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rails new demo without getting a error message?

Michael Amay asked in Rails

I did the basic installtion from a book I'm reading and i get the following error message when i type in the command rails new demo in my terminal.

Michaels-MacBook-Air:~ michaeljonathanamay$ rails new demo
Traceback (most recent call last):
    23: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/bin/rails:23:in `<main>'
    22: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/bin/rails:23:in `load'
    21: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/bin/rails:9:in `<top (required)>'
    20: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    19: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    18: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/lib/rails/cli.rb:15:in `<top (required)>'
    17: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    16: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    15: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/lib/rails/commands/application.rb:29:in `<top (required)>'
    14: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    13: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    12: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/lib/rails/generators/rails/app/app_generator.rb:3:in `<top (required)>'
    11: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/lib/rails/generators/rails/app/app_generator.rb:140:in `<module:Rails>'
    10: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/lib/rails/generators/rails/app/app_generator.rb:146:in `<module:Generators>'
     9: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/lib/rails/generators/rails/app/app_generator.rb:147:in `<class:AppGenerator>'
     8: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/lib/rails/generators/app_base.rb:61:in `add_shared_options_for'
     7: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/railties-4.0.0/lib/rails/generators/base.rb:204:in `class_option'
     6: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/thor-1.0.0/lib/thor/base.rb:304:in `class_option'
     5: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/thor-1.0.0/lib/thor/base.rb:582:in `build_option'
     4: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/thor-1.0.0/lib/thor/base.rb:582:in `new'
     3: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/thor-1.0.0/lib/thor/parser/option.rb:11:in `initialize'
     2: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/thor-1.0.0/lib/thor/parser/argument.rb:24:in `initialize'
     1: from /Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/thor-1.0.0/lib/thor/parser/option.rb:115:in `validate!'
/Users/michaeljonathanamay/.rvm/gems/ruby-2.0.0-p648/gems/thor-1.0.0/lib/thor/parser/option.rb:140:in `validate_default_type!': undefined method `deprecation_warning' for Thor:Class (NoMethodError)
Michaels-MacBook-Air:~ michaeljonathanamay$ 

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Does anyone have any suggestion on how to sovle this problem?

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