Exception: System.Web.CachedPathData.GetConfigPathData(String configPath)

Error Time: ...
Machine Name: S20129
Request URL: http://www.site1.com/page1|||RequestType:GET|||UserHostAddress:...|||UrlReferrer:
Error Message:
Error Source: System.Web Error
StackTrace:
at System.Web.CachedPathData.GetConfigPathData(String configPath)
at System.Web.CachedPathData.GetVirtualPathData(VirtualPath virtualPath, Boolean permitPathsOutsideApp)
at System.Web.HttpContext.GetFilePathData() at System.Web.HttpContext.GetConfigurationPathData()
at System.Web.Configuration.RuntimeConfig.GetConfig(HttpContext context)
at System.Web.HttpContext.get_ImpersonationToken()
at System.Web.ClientImpersonationContext.Start(HttpContext context, Boolean throwOnError)
at System.Web.HttpApplication.ThreadContext.SetImpersonationContext()
at System.Web.HttpApplication.ThreadContext.Enter(Boolean setImpersonationContext)
at System.Web.HttpApplication.OnThreadEnterPrivate(Boolean setImpersonationContext)
at System.Web.HttpApplication.ApplicationStepManager.ResumeSteps(Exception error) ========================================

还原错误http://www.site1.com/page1.
以dot结尾会出现以上错误