Xamarin.Mac 目标 _CodesignFrameworks，Codesign 任务意外失败，找不到路径的一部分 _CodeSignature

如何解决Xamarin.Mac 目标 _CodesignFrameworks，Codesign 任务意外失败，找不到路径的一部分 _CodeSignature

我正在尝试构建一个链接到本机框架的 Xamarin.Mac 项目，该项目由于与代码设计相关的错误而开始失败。

我得到的错误是：

Target "_CodesignFrameworks" in file "/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Mac/Xamarin.Shared.targets":
  Building target "_CodesignFrameworks" completely.
  Output file "obj/Release/codesign/ThemeKit" does not exist.
  Task "Codesign"
    Tool /usr/bin/codesign execution started with arguments: -v --force --timestamp=none --sign F825BA46C7556F0CAFD8305AFF8C5338D8054373 /Users/alanfransham/Projects/MyApp/MyApp.Mac/bin/Release/MyApp.app//Contents/Frameworks/ThemeKit.framework/ThemeKit
    Tool /usr/bin/codesign execution finished (exit code = 0).
    /Users/alanfransham/Projects/MyApp/MyApp.Mac/bin/Release/MyApp.app//Contents/Frameworks/ThemeKit.framework/ThemeKit: replacing existing signature
    /Users/alanfransham/Projects/MyApp/MyApp.Mac/bin/Release/MyApp.app//Contents/Frameworks/ThemeKit.framework/ThemeKit: signed bundle with Mach-O thin (x86_64) [com.luckymarmot.ThemeKit]
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Mac/Xamarin.Shared.targets(975,3): error MSB4018: The "Codesign" task Failed unexpectedly.
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Mac/Xamarin.Shared.targets(975,3): error MSB4018: System.AggregateException: One or more errors occurred. (Could not find a part of the path '/Users/alanfransham/Projects/MyApp/MyApp.Mac/bin/Release/MyApp.app/Contents/Frameworks/ThemeKit.framework/_CodeSignature'.) ---> System.IO.DirectoryNotFoundException: Could not find a part of the path '/Users/alanfransham/Projects/MyApp/MyApp.Mac/bin/Release/MyApp.app/Contents/Frameworks/ThemeKit.framework/_CodeSignature'.

有问题的链接框架确实有一个 _CodeSignature 文件夹，但它与 msbuild 任务查找的位置不同。

我使用相同的项目结构构建至少六个月，并且在 2021 年 3 月 19 日构建版本时没有问题。我已将代码恢复为上次成功构建时使用的版本，这现在也失败了。我总是让我的工具保持最新状态，所以我怀疑构建的工作方式发生了变化？

对于如何诊断和解决此问题的任何建议，我们将不胜感激。

如果我遗漏了任何重要的事情，请告诉我。