无法登录 Visual Studio 2015 - System.Net.Http.Primitives 未加载

Question

我的 VS Community 2015 许可证过期了。现在，任何尝试登录或更新许可证的操作都会导致错误消息“调用目标引发了异常”。我运行devenv /log并追踪到问题出在“无法加载文件或程序集‘System.Net.Http.Primitives，Version=1.5.0.0...’”异常，该异常在 VS 尝试进行身份验证或类似操作时引发。

我尝试修复然后重新安装 VStudio，包括在 Github 中运行“scorch”卸载工具。我尝试运行sfc /scannow，但没有发现完整性违规。我在网上找到的与此异常相关的所有内容都告诉我如何为在 VS 中运行的项目修复它，但没有告诉我如何在 VS 本身抛出它时修复它。我试过了devenv /resetuserdata。/ResetSettings什么都没用。

我觉得我需要从受信任的 DLL 手动更新我的 GAC，但我实在想不出如何做到这一点。

这是发生错误的完整 XML 日志条目元素devenv /log：

<entry>
<record>368</record>
<time>2016/12/13 17:21:54.787</time>
<type>Error</type>
<source>UserConnection</source>
<description>User:IdeUser, Exception has been thrown by the target of an invocation.: TargetInvocationException [inner: Could not load file or assembly &apos;System.Net.Http.Primitives, Version=1.5.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos; or one of its dependencies. The system cannot find the file specified.] during ExplicitSignIn&#x000D;&#x000A;   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)&#x000D;&#x000A;   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)&#x000D;&#x000A;   at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark&amp; stackMark)&#x000D;&#x000A;   at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)&#x000D;&#x000A;   at System.Activator.CreateInstance(Type type, Object[] args)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.Client.VssConnection.&lt;GetClientInstanceAsync&gt;d__15.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.Client.VssConnection.&lt;GetClientServiceImplAsync&gt;d__13.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.Client.VssConnection.&lt;GetClientAsync&gt;d__10`1.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.Client.VssServerDataProvider.&lt;ConnectAsync&gt;d__39.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.Connected.ConnectedUser.IdeConnector.&lt;ConnectAsync&gt;d__2.MoveNext() (ActivityId: 00000000-0000-0000-0000-000000000000)</description>

有任何想法吗？