我正在关注一个ruby教程，当运行' rails s '时出现此错误 .

这之前工作正常，但现在我无法启动rails服务器 . 好像我在rails中改变了一些东西 .

在Run rails server -h上开始启动WEBrick Rails 4.1.5应用程序以获取更多启动选项注意：服务器正在侦听所有接口（0.0.0.0） . 考虑使用127.0 0.1（ - 绑定选项）Ctrl-C来关闭服务器xiting：/ RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.1.5/lib/act ve_support / dependencies . rb：247：in require'：无法从c：/RailsInstaller / Ruby2.0.0 / lib / ruby / gems / 2.0.0 / gems / activesupport- .1.5 / lib / active_support / dependencies加载此类文件 - syslogger（LoadError） .rb：247：inblock in require'from c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport- .1.5 / lib / active_support / dependencies.rb:232:in load_dependency'from c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport- .1.5 / lib / active_support / dependencies.rb:247:inrequire'来自c：/ Sites / omrails / config / environment . rb：8：在<top（required）>'中来自c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport- .1.5 / lib / active_support / dependencies.rb:247：inrequire 'from c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport- .1.5 / lib / active_support / dependencies.rb:247：in in block in c'/ RailsInst来自c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems的aller / Ruby2.0.0 / lib / ruby / gems / 2.0.0 / gems / activesupport- .1.5 / lib / active_support / dependencies.rb:232:inload_dependency' /2.0.0/gems/activesupport- .1.5 / lib / active_support / dependencies.rb:247:in require'from c：/Sites/omrails/config.ru：3：inblock in'from c：/ RailsInstaller / Ruby2 . 0.0 / lib / ruby / gems / 2.0.0 / gems / rack-1.5.2 / lib rack / builder.rb:55:in instance_eval'from c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0 . 0 / gems / rack-1.5.2 / lib rack / builder.rb:55:ininitialize'来自c：/Sites/omrails/config.ru:in new'from c：/Sites/omrails/config.ru：in'来自c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib rack / builder.rb：49：in eval'from c：/RailsInstaller/Ruby2.0.0/ lib / ruby / gems / 2.0.0 / gems / rack-1.5.2 / lib rack / builder.rb:49:innew_from_string'from c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems /rack-1.5.2/lib rack / builder.rb：40：在parse_file'中来自c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib rack / server.rb：277：在来自c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib rack / server.rb：199：来自c：/ RailsInstaller / Ruby2的app'中的build_app_and_options_from_config' . 0.0 / lib / ruby / gems / 2.0.0 / gems / railties-4.1.5 lib / rails / commands / server.rb:50:inapp'from c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0 .0 / gems / rack-1.5.2 / lib rack / server.rb：314：in wrapped_app'from c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.5 lib / rails / commands / server.rb：130：inlog_to_stdout'来自c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.5 lib / rails / commands / server.rb ：67：从'开始'来自c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.5 lib / rails / commands / commands_tasks.rb:81:inblock in server'from c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.5 lib / rails / commands / commands_tasks.rb:76:with c from the c：/RailsInstaller/Ruby2.0.0 /lib/ruby/gems/2.0.0/gems/railties-4.1.5 lib / rails / commands / commands_tasks.rb:76:inserver'from c：/RailsInstaller/Ruby2.0 . 0 / lib / ruby / gems / 2.0.0 / gems / railties-4.1.5 lib / rails / commands / commands_tasks.rb:40:in run_command！'来自c：/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.5 lib / rails / commands.rb:17:in"from bin / rails：4：in require'from斌/导轨：4：

编辑我试图重新安装rails，现在我在启动rails服务器时出现此错误

C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/activesupport-4.1.5/lib/active_support/de pendencies.rb:247：in require'：无法加载此类文件 - sqlite3 / sqlite3_native （LoadError）来自C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/activesupport-4.1.5/lib/acti ve_support / dependencies.rb:247：inblock in require'from C：/ Ruby21- x64 / lib / ruby / gems / 2.1.0 / gems / activesupport-4.1.5 / lib / acti ve_support / dependencies.rb:232:in load_dependency'来自C：/Ruby21-x64/lib/ruby/gems/2.1 . 0 / gems / activesupport-4.1.5 / lib / acti ve_support / dependencies.rb:247:inrequire'来自C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/sqlite3-1.3.9-x64 -mingw32 / li b / sqlite3.rb：6：在<top（required）>'中进行救援C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/sqlite3-1.3.9-x64-mingw32/li b / sqlite3.rb：2：in'from C：/ Ruby21-x64 / lib / ruby / gems / 2.1.0 / gems / bundler-1.7.3 / lib / bundler / ru ntime.rb:76:in require'from C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/ bundler-1.7.3 / lib / bundler / ru ntime.rb：76：inblock（2级）in require'来自C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/bundler-1.7.3 / lib / bundler / ru ntime.rb：72：在每个'来自C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/bundler-1.7.3/lib/bundler/ru ntime.rb： 72：inblock in require'from C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/bundler-1.7.3/lib/bundler/ru ntime.rb:61:in:"::::::: Ruby21-x64 / lib / ruby / gems / 2.1.0 / gems / bundler-1.7.3 / lib / bundler / ru ntime.rb:61:inrequire'来自C：/Ruby21-x64/lib/ruby/gems/2.1 .0 / gems / bundler-1.7.3 / lib / bundler.rb：133：在require'from C：/Sites/omrails/config/application.rb：7：in'from C：/ Ruby21-x64 / lib / ruby / gems / 2.1.0 / gems / railties-4.1.5 / lib / rails / com mands / commands_tasks.rb：79：in require'from C：/Ruby21-x64/lib/ruby/gems/2.1.0/宝石/ railties-4.1.5 / lib / rails / com mands / commands_tasks.rb：79：服务器中的inblock来自C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/railties-4.1.5/lib/rails/com mands / commands_tasks.rb：76：点击'来自C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/railties-4.1.5/lib/rails/com mands / commands_tasks.rb:76:inserver'来自C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/railties-4.1.5/lib/rails/com mands / commands_tasks.rb:40:in run_command！'来自C：/Ruby21-x64/lib/ruby/gems/2.1.0/gems/railties-4.1.5/lib/rails/com mands.rb:17:in"from bin / rails：4：in require'from斌/导轨：4：