官方版

Fiddler crashes on startup complaining about the”Configuration System”:

Sorry, you may have found a bug...
    Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report using the Help | Send Feedback menu.
    Configuration system failed to initialize
    Source: System.Configuration
    at System.Configuration.ConfigurationManager.PrepareConfigSystem()
    at System.Configuration.ConfigurationManager.GetSection(String sectionName)
    System.Configuration.ConfigurationErrorsException: Unrecognized configuration section system.serviceModel. (c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Config\machine.config line 134)
    or
    System.Configuration.ConfigurationErrorsException: Unrecognized configuration section runtime. (C:\Program Files (x86)\Fiddler2\Fiddler.exe.Config line 2)

This error message indicates that one of the .NET Framework’s configuration files is corrupt. The most common fix for this is to visit WindowsUpdate and install all available .NET Framework updates. If that doesn’t work, try re-installing the .NET Framework. If that doesn’t work, try editing the file specified in the error message to correct whatever the error message is complaining about.

谷歌翻译版

Fiddler crashes on startup complaining about the”Configuration System”:

Sorry, you may have found a bug...
    Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report using the Help | Send Feedback menu.
    Configuration system failed to initialize
    Source: System.Configuration
    at System.Configuration.ConfigurationManager.PrepareConfigSystem()
    at System.Configuration.ConfigurationManager.GetSection(String sectionName)
    System.Configuration.ConfigurationErrorsException: Unrecognized configuration section system.serviceModel. (c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Config\machine.config line 134)
    or
    System.Configuration.ConfigurationErrorsException: Unrecognized configuration section runtime. (C:\Program Files (x86)\Fiddler2\Fiddler.exe.Config line 2)

此错误信息表明.NET Framework的配置文件之一已损坏。 最常见的解决方法是访问WindowsUpdate并安装所有可用的.NET Framework更新。如果这不起作用，请尝试重新安装.NET Framework。 如果这不起作用，请尝试编辑错误消息中指定的文件，以更正错误消息所抱怨的内容。