Ruby не может загрузить такой файл - active_support/core_ext/object/blank

Я пытался запустить brew doctor но система выскочила ошибка

/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in 'require': не удается загрузить такой файл - active_support/core_ext/object/blank (LoadError)

Поиск в Интернете и другой пост предложил просто "gem install activesupport", но затем я столкнулся с ошибкой:

ERROR:  Error installing activesupport:
    i18n requires Ruby version >= 2.3.0.

Я также пытался установить rvm ruby-2.3.0, но снова появилась та же ошибка

[2019-02-26 10:07:41] requirements_osx_brew_libs_install
requirements_osx_brew_libs_install ()  { 
    brew install "[email protected]" --force || { 
        \typeset ret=$?;
        requirements_osx_brew_libs_error "installation";
        return $ret
    } } current path: /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
PATH=/Users/{user_name}/.aw/pex_resources/scripts/binaries:/usr/local/sbin:/Users/fengjiao/.rbenv/shims:/Users/{user_name}/.nvm/v0.10.32/bin:/Users/fengjiao/bin:/usr/local/sbin:/usr/local/bin:/Users/{user_name}/.rbenv/shims:/Users/{user_name}/.nvm/v0.10.32/bin:/Users/{user_name}/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/munki:/opt/X11/bin:/Users/fengjiao/gocode/bin:/Users/{user_name}/.rvm/bin
command(10): requirements_osx_brew_libs_install autoconf automake
libtool pkg-config coreutils libyaml readline libksba [email protected]
++ brew install autoconf automake libtool pkg-config coreutils libyaml readline libksba [email protected] --force
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in
'require': cannot load such file --
active_support/core_ext/object/blank (LoadError)    from
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in
'require'   from /usr/local/Homebrew/Library/Homebrew/global.rb:10:in
'<top (required)>'  from
/usr/local/Homebrew/Library/Homebrew/brew.rb:21:in 'require_relative'
    from /usr/local/Homebrew/Library/Homebrew/brew.rb:21:in '<main>'
++ typeset ret=1
++ requirements_osx_brew_libs_error installation
++ rvm_warn 'There were package installation errors, make sure to read the log.

Try 'brew tap --repair' and make sure 'brew doctor' looks reasonable.