Installation Error

[jeanffc]

Follow the error

macOS Sierra 10.12.1
rails 4.2.6
ruby 2.2.3p173

$ rails g my_admin:install
/Applications/MAMP/htdocs/my_admin/config/application.rb:10:in <module:MyAdmin>': superclass mismatch for class Application (TypeError) from /Applications/MAMP/htdocs/my_admin/config/application.rb:9:in <top (required)>'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-2.0.0/lib/spring/application.rb:82:in require' from /usr/local/lib/ruby/gems/2.2.0/gems/spring-2.0.0/lib/spring/application.rb:82:in preload'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-2.0.0/lib/spring/application.rb:143:in serve' from /usr/local/lib/ruby/gems/2.2.0/gems/spring-2.0.0/lib/spring/application.rb:131:in block in run'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-2.0.0/lib/spring/application.rb:125:in loop' from /usr/local/lib/ruby/gems/2.2.0/gems/spring-2.0.0/lib/spring/application.rb:125:in run'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in <top (required)>' from /usr/local/Cellar/ruby/2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in require'
from /usr/local/Cellar/ruby/2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in require' from -e:1:in

'

[jeanffc]

I found the error

I could not use the project name 'my_admin'

So I switched to another name and solved the problem