Visual Studio中的错误...扩展加载问题

我打开了VisualStudio 2017（最新-刚刚更新）。我导航到一个类型脚本文件（可能恰好是这种类型的文件），并得到以下提示：

---------------------------
Microsoft Visual Studio
---------------------------
An exception has been encountered. This may be caused by an extension.

You can get more information by examining the file 

'C:\...\AppData\Roaming\Microsoft\VisualStudio\15.0_c4122470\ActivityLog.xml'

在我的活动日志中，我收到很多关于软件包的警告：

Unexpected system error mode before loading package <enter package name here>

真正的问题是在文件末尾，我得到一个错误：

System.NullReferenceException: Object reference not set to an instance of an object.
   at 
Microsoft.WindowsAzure.StreamAnalytics.UI.ViewModel.JavaScriptFunctionViewModel.GetJSFunctionInputsCount()
   at 
Microsoft.WindowsAzure.StreamAnalytics.UI.ViewModel.JavaScriptFunctionViewModel.Initialize(JSFunctionInfo configInfo)
   at 
Microsoft.WindowsAzure.StreamAnalytics.UI.ViewModel.JavaScriptFunctionViewModel.InitializeForEditor()
   at 
Microsoft.WindowsAzure.StreamAnalytics.UI.ViewModel.JavaScriptFunctionViewModel..ctor(String jsFilePath, Action saveJsFile, Action setJsFileDirty)
   at 
Microsoft.Cosmos.ScopeStudio.VsExtension.EditorMarginExtension.JavascriptEditorMargin..ctor(IWpfTextViewHost textViewHost)
   at 
Microsoft.Cosmos.ScopeStudio.VsExtension.EditorMarginExtension.JavascriptEditorMarginFactory.CreateMargin(IWpfTextViewHost wpfTextViewHost, IWpfTextViewMargin marginContainer)
   at 
Microsoft.VisualStudio.Text.Utilities.ContainerMargin.<AddMargins>b__25_1(IWpfTextViewMarginProvider mp)
   at
Microsoft.VisualStudio.Text.Utilities.GuardedOperations.InstantiateExtension[TExtension,TMetadata,TExtensionInstance](Object errorSource, Lazy`2 provider, Func`2 getter)
--- End of stack trace from previous location where exception was thrown ---
   at 
Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)

我努力了：

• 清除临时文件夹
• 清除VS文件夹中的模型缓存
• 更新包
• 更新扩展

似乎没有任何帮助。有谁想到这会导致什么？