Unable to start Rails Server

rails s
Warning: Running `gem pristine --all` to regenerate your installed gemspecs (and deleting then reinstalling your bundle if you use bundle --path) will improve the startup performance of Spring.
=> Booting WEBrick
=> Rails 4.2.2 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/home/arthur/.gem/ruby/gems/turbolinks-5.1.0/lib/turbolinks.rb:25:in `block (2 levels) in <class:Engine>': private method `include' called for ActionDispatch::Assertions:Module (NoMethodError)
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load'
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/lazy_load_hooks.rb:27:in `each'
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/lazy_load_hooks.rb:27:in `on_load'
    from /home/arthur/.gem/ruby/gems/turbolinks-5.1.0/lib/turbolinks.rb:21:in `block in <class:Engine>'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/initializable.rb:30:in `instance_exec'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/initializable.rb:30:in `run'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /usr/share/ruby/tsort.rb:150:in `block in tsort_each'
    from /usr/share/ruby/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
    from /usr/share/ruby/tsort.rb:219:in `each_strongly_connected_component_from'
    from /usr/share/ruby/tsort.rb:182:in `block in each_strongly_connected_component'
    from /usr/share/ruby/tsort.rb:180:in `each'
    from /usr/share/ruby/tsort.rb:180:in `each_strongly_connected_component'
    from /usr/share/ruby/tsort.rb:148:in `tsort_each'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/initializable.rb:54:in `run_initializers'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/application.rb:352:in `initialize!'
    from /home/arthur/Projects/Rails/serenityforms/config/environment.rb:5:in `<top (required)>'
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:274:in `require'
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:274:in `block in require'
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /home/arthur/.gem/ruby/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:274:in `require'
    from /home/arthur/Projects/Rails/serenityforms/config.ru:3:in `block in <main>'
    from /home/arthur/.gem/ruby/gems/rack-1.6.9/lib/rack/builder.rb:55:in `instance_eval'
    from /home/arthur/.gem/ruby/gems/rack-1.6.9/lib/rack/builder.rb:55:in `initialize'
    from /home/arthur/Projects/Rails/serenityforms/config.ru:in `new'
    from /home/arthur/Projects/Rails/serenityforms/config.ru:in `<main>'
    from /home/arthur/.gem/ruby/gems/rack-1.6.9/lib/rack/builder.rb:49:in `eval'
    from /home/arthur/.gem/ruby/gems/rack-1.6.9/lib/rack/builder.rb:49:in `new_from_string'
    from /home/arthur/.gem/ruby/gems/rack-1.6.9/lib/rack/builder.rb:40:in `parse_file'
    from /home/arthur/.gem/ruby/gems/rack-1.6.9/lib/rack/server.rb:300:in `build_app_and_options_from_config'
    from /home/arthur/.gem/ruby/gems/rack-1.6.9/lib/rack/server.rb:209:in `app'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/commands/server.rb:61:in `app'
    from /home/arthur/.gem/ruby/gems/rack-1.6.9/lib/rack/server.rb:337:in `wrapped_app'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/commands/server.rb:139:in `log_to_stdout'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/commands/server.rb:78:in `start'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:80:in `block in server'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /home/arthur/.gem/ruby/gems/railties-4.2.2/lib/rails/commands.rb:17:in `<top (required)>'
    from /home/arthur/Projects/Rails/serenityforms/bin/rails:9:in `require'
    from /home/arthur/Projects/Rails/serenityforms/bin/rails:9:in `<top (required)>'
    from /home/arthur/.gem/ruby/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load'
    from /home/arthur/.gem/ruby/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call'
    from /home/arthur/.gem/ruby/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
    from /home/arthur/.gem/ruby/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
    from /home/arthur/.gem/ruby/gems/spring-2.0.2/bin/spring:49:in `<top (required)>'
    from /home/arthur/.gem/ruby/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
    from /home/arthur/.gem/ruby/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
    from /usr/local/share/ruby/site_ruby/rubygems/core_ext/kernel_require.rb:68:in `require'
    from /usr/local/share/ruby/site_ruby/rubygems/core_ext/kernel_require.rb:68:in `require'
    from /home/arthur/Projects/Rails/serenityforms/bin/spring:14:in `<top (required)>'
    from bin/rails:3:in `load'
    from bin/rails:3:in `<main>'