我想在 CPanel 上安装 Fedena，但是当我使用该命令时rake gems:unpack出现此错误：
Fedena requires i18n gem version 0.4.0 to be installed.
Run gem install i18n -v 0.4.0
rake aborted!
ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead.
/home/iiumprin/public_html/projectfedena-fedena-84b5ad9/Rakefile:8
(See full trace by running task with --trace)
我的 Ruby 中有 i18n gem，但它仍然给我这个错误，我该怎么办？
'耙宝石：解压 --trace'
iiumprin@iiumprinting.com [~/public_html/projectfedena-fedena-84b5ad9]# rake gems:unpack --trace
Fedena requires i18n gem version 0.4.0 to be installed.Run gem install i18n -v 0.4.0
rake aborted!
ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead.
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/rdoctask.rb:2
/usr/lib/ruby/site_ruby/1.8/rubygems/core_ext/kernel_require.rb:45:in `gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/core_ext/kernel_require.rb:45:in `require'
/home/iiumprin/public_html/projectfedena-fedena-84b5ad9/Rakefile:8
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/rake_module.rb:25:in `load'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/rake_module.rb:25:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/application.rb:637:in `raw_load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/application.rb:94:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/application.rb:165:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/application.rb:93:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/application.rb:77:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/application.rb:165:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/lib/rake/application.rb:75:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-10.1.0/bin/rake:33
/usr/bin/rake:23:in `load'
/usr/bin/rake:23