Ruby on Rails

hi there.

i'm new in ruby on rails.
i using kali linux , i complete the rbenv and all the gems installation.

now i create a demo and when i type this => rails server

i get this error =>



Error! You've somehow installed openssl from rubygems.org
Remove openssl from your Gemfile and delete it from your gems
/usr/local/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/key_generator.rb:2:in
`require': cannot load such file -- openssl (LoadError)
from
/usr/local/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/key_generator.rb:2:in
`<top (required)>'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application.rb:5:in
`require'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application.rb:5:in
`<top (required)>'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails.rb:11:in
`require'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails.rb:11:in
`<top (required)>'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:4:in
`require'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:4:in
`<top (required)>'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:123:in
`require'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:123:in
`require_command!'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:73:in
`server'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in
`run_command!'
from
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands.rb:17:in
`<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'






anyone can help me please?

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