VS 17.13.6安装GitHub Copilot后Chat无法打开报错求助

在Visual Studio 17.13.6版本中安装GitHub Copilot组件后，无法打开Copilot Chat，出现以下错误：

错误摘要：

An exception was encountered while constructing the content of this frame.  This information is also logged in "C:\Users\{{YOUR_USER_NAME}}\AppData\Roaming\Microsoft\VisualStudio\17.0_f9957bae\ActivityLog.xml".

异常详情：

Microsoft.VisualStudio.Composition.CompositionFailedException: Expected 1 export(s) with contract name "Microsoft.VisualStudio.Copilot.UI.ChatMefPartAccessor" but found 0 after applying applicable constraints.
   at Microsoft.VisualStudio.Composition.ExportProvider.GetExports(ImportDefinition importDefinition)
   at Microsoft.VisualStudio.Composition.ExportProvider.GetExports[T,TMetadataView](String contractName, ImportCardinality cardinality)
   at Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T,TMetadataView](String contractName)
   at Microsoft.VisualStudio.Composition.ExportProvider.GetExportedValue[T]()
   at Microsoft.VisualStudio.ComponentModelHost.ComponentModel.GetService[T]()
   at Microsoft.VisualStudio.Conversations.UI.Internal.ChatWindow.ChatHelpWindow.CreationContext.<CreateInstanceAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Conversations.UI.Internal.ConversationsUIPackage.<InitializeToolWindowAsync>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Shell.AsyncPackage.<>c__DisplayClass19_0.<<Microsoft-VisualStudio-Shell-Interop-IVsAsyncToolWindowFactory-InitializeToolWindowAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)
   at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)
   at Microsoft.VisualStudio.Shell.VsTaskLibraryHelper.<>c__DisplayClass54_0.<<CancelWhenCancellationRequested>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)
   at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)
   at Microsoft.VisualStudio.Shell.VsTaskLibraryHelper.<>c__DisplayClass54_0.<<CancelWhenCancellationRequested>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)
   at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)
   at Microsoft.VisualStudio.Shell.AsyncPackage.<CompleteToolWindowCreationAsync>d__24.MoveNext()

可行解决方案 #

• 重置Visual Studio用户数据缓存

  1. 关闭所有Visual Studio实例
  2. 打开命令提示符（建议以管理员身份运行），执行命令：devenv /resetuserdata
  3. 重启Visual Studio，重新登录GitHub Copilot账号

• 修复/重新安装GitHub Copilot组件

  1. 打开Visual Studio，依次点击「扩展」>「管理扩展」
  2. 在「已安装」标签页找到GitHub Copilot，点击「卸载」
  3. 卸载完成后重启Visual Studio，通过扩展市场或Visual Studio安装程序重新安装Copilot组件
  4. 若使用安装程序，选择「修改」选项，确保Copilot相关组件已勾选后完成安装

• 清理MEF组件缓存

  1. 关闭Visual Studio
  2. 导航到路径：C:\Users\<你的用户名>\AppData\Local\Microsoft\VisualStudio\17.0_<随机标识>\ComponentModelCache
  3. 删除该文件夹下的所有文件
  4. 重启Visual Studio

• 升级Visual Studio到最新版本
  打开Visual Studio安装程序，检查并安装最新的17.x版本更新，旧版本的兼容性问题通常会在新版本中得到修复

内容的提问来源于stack exchange，提问作者Viswa