与缺少软件包相关的奇怪 MS Build 错误

Question

我正在尝试运行 MSBuild，但由于缺少包而突然损坏：

>msbuild .
Microsoft (R) Build Engine version 15.9.21+g9802d43bc3 for .NET Framework
Copyright (C) Microsoft Corporation. All rights reserved.

Building the projects in this solution one at a time. To enable parallel build, please add the "/m" switch.
MSBUILD : error MSB1025: An internal failure occurred while running MSBuild.
System.IO.FileLoadException: Could not load file or assembly 'System.Threading.Tasks.Dataflow, Version=4.6.3.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
File name: 'System.Threading.Tasks.Dataflow, Version=4.6.3.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at Microsoft.Build.Execution.BuildManager.Dispose(Boolean disposing)
   at Microsoft.Build.Execution.BuildManager.Dispose()
   at Microsoft.Build.CommandLine.MSBuildApp.BuildProject(String projectFile, String[] targets, String toolsVersion, Dictionary`2 globalProperties, Dictionary`2 restoreProperties, ILogger[] loggers, LoggerVerbosity verbosity, DistributedLoggerRecord[] distributedLoggerRecords, Boolean needToValidateProject, String schemaFile, Int32 cpuCount, Boolean enableNodeReuse, TextWriter preprocessWriter, Boolean detailedSummary, ISet`1 warningsAsErrors, ISet`1 warningsAsMessages, Boolean enableRestore, ProfilerLogger profilerLogger, Boolean enableProfiler)
   at Microsoft.Build.CommandLine.MSBuildApp.Execute(String commandLine)

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].


Unhandled Exception: System.IO.FileLoadException: Could not load file or assembly 'System.Threading.Tasks.Dataflow, Version=4.6.3.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
   at Microsoft.Build.Execution.BuildManager.Dispose(Boolean disposing)
   at Microsoft.Build.Execution.BuildManager.Dispose()
   at Microsoft.Build.CommandLine.MSBuildApp.BuildProject(String projectFile, String[] targets, String toolsVersion, Dictionary`2 globalProperties, Dictionary`2 restoreProperties, ILogger[] loggers, LoggerVerbosity verbosity, DistributedLoggerRecord[] distributedLoggerRecords, Boolean needToValidateProject, String schemaFile, Int32 cpuCount, Boolean enableNodeReuse, TextWriter preprocessWriter, Boolean detailedSummary, ISet`1 warningsAsErrors, ISet`1 warningsAsMessages, Boolean enableRestore, ProfilerLogger profilerLogger, Boolean enableProfiler)
   at Microsoft.Build.CommandLine.MSBuildApp.Execute(String commandLine)
   at Microsoft.Build.CommandLine.MSBuildApp.Main()

请注意，这不是我的 C# 项目中的一个包，而是一个显然由 MsBuild 本身使用的包......我尝试修复 Visual Studio，下载更新的构建工具，但没有任何改变。

我怎样才能满足这个包要求，以便 MSBuild 再次工作？