XAML设计器无法打开(发生未经处理异常).

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使用版本:vs2017 社区版
新建项目后使用设计器就会显示此错误.Blend中问题依然存在.
异常信息:
System.Runtime.InteropServices.COMException
异常来自 HRESULT:0xD00000F3
   在 Microsoft.VisualStudio.DesignTools.UwpDesignerHost.AppPackage.AppPackageNativeMethods.IApplicationActivationManager.ActivateApplication(String appUserModelId, String activationContext, ActivateOptions options, Int32& processId)
   在 Microsoft.VisualStudio.DesignTools.UwpDesignerHost.AppPackage.AppPackageHelper.ActivateApplication(String appUserModelId, Boolean designerMode, String activationContext, Object site)
   在 Microsoft.VisualStudio.DesignTools.UwpDesignerHost.UwpHostPlatform.ActivateApplication(String appUserModelId, Boolean designerMode, String activationContext, Object site)
   在 Microsoft.VisualStudio.DesignTools.XamlDesignerHost.Platform.AppContainerProcessDomainFactory.ActivateApplicationInternal(String appUserModelId, String activationContext, Object site)
   在 Microsoft.VisualStudio.DesignTools.XamlDesignerHost.Platform.AppContainerProcessDomainFactory.CreateDesignerProcess(String applicationPath, String clientPort, Uri hostUri, IDictionary environmentVariables, Int32& processId, Object& processData)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.ProcessDomainFactory.ProcessIsolationDomain..ctor(ProcessDomainFactory factory, IIsolationBoundary boundary, AppDomainSetup appDomainInfo, IIsolationTarget isolationTarget,
String baseDirectory)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.ProcessDomainFactory.CreateIsolationDomain(IIsolationBoundary boundary)
   在 Microsoft.VisualStudio.DesignTools.XamlDesignerHost.Platform.AppContainerProcessDomainFactory.CreateIsolationDomain(IIsolationBoundary boundary)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.IsolationBoundary.Initialize()
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.IsolationBoundary.CreateInstance[T](Type type)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.IsolatedObjectFactory.Initialize()
   在 Microsoft.VisualStudio.DesignTools.DesignerHost.Services.VSIsolationService.CreateObjectFactory(IIsolationDomainFactory isolationDomainFactory, IObjectCatalog catalog)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.IsolationService.CreateLease(IIsolationDomainFactory domainFactory)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.IsolatedDesignerService.CreateLease(IIsolationDomainFactory domainFactory, CancellationToken cancelToken, DesignerServiceEntry& entry, IServiceProvider serviceOverrides)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.IsolatedDesignerService.IsolatedDesignerView.CreateDesignerViewInfo(CancellationToken cancelToken)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.IsolatedTaskScheduler.InvokeWithCulture[T](CultureInfo culture, Func`2 func, CancellationToken cancelToken)
   在 Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.IsolatedTaskScheduler.<>c__DisplayClass10_0`1.<StartTask>b__0()
   在 System.Threading.Tasks.Task`1.InnerInvoke()
   在 System.Threading.Tasks.Task.Execute()

请求帮助!