C# Unity生成并运行游戏错误：生成玩家时出错：提取引用的DLL失败

以前使用Unity engine 4.5创建了一个游戏，现在更新为Unity engine 5。游戏运行良好，正在完善中。但是，当我单击“为android构建并运行”时，出现以下错误：
作为初学者，我不知道如何处理这个错误

NullReferenceException: Object reference not set to an instance of an object
    UnityEditor.PluginImporter+<GetImporters>c__AnonStoreyC.<>m__E (UnityEditor.PluginImporter imp) (at C:/buildslave/unity/build/artifacts/generated/common/editor/PluginImporterBindings.gen.cs:104)
    System.Linq.Enumerable+<CreateWhereIterator>c__Iterator1D`1[UnityEditor.PluginImporter].MoveNext ()
    System.Collections.Generic.List`1[UnityEditor.PluginImporter].AddEnumerable (IEnumerable`1 enumerable) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections.Generic/List.cs:128)
    System.Collections.Generic.List`1[UnityEditor.PluginImporter]..ctor (IEnumerable`1 collection) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections.Generic/List.cs:65)
    System.Linq.Enumerable.ToArray[PluginImporter] (IEnumerable`1 source)
    UnityEditor.PluginImporter.GetImporters (System.String platformName) (at C:/buildslave/unity/build/artifacts/generated/common/editor/PluginImporterBindings.gen.cs:103)
    UnityEditor.PluginImporter.GetImporters (BuildTarget platform) (at C:/buildslave/unity/build/artifacts/generated/common/editor/PluginImporterBindings.gen.cs:111)
    UnityEditor.AndroidPluginImporterExtension.CheckFileCollisions (System.String buildTargetName)
    UnityEditorInternal.PluginsHelper.CheckFileCollisions (BuildTarget buildTarget) (at C:/buildslave/unity/build/Editor/Mono/Plugins/PluginsHelper.cs:25)
    UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()

NullReferenceException:对象引用未设置为对象的实例
UnityEditor.PluginImporter+c_uanostoreyc.m_ue（UnityEditor.PluginImporter imp）（位于c:/buildslave/unity/build/artifacts/generated/common/editor/PluginImporterBindings.gen.cs:104）
System.Linq.Enumerable+c__迭代器1D`1[UnityEdit.PluginImporter].MoveNext（）
System.Collections.Generic.List`1[UnityEdit.PluginImporter].AddEnumerable（IEnumerable`1 enumerable）（位于/Users/builduser/buildslave/mono运行时和classlibs/build/mcs/class/corlib/System.Collections.Generic/List.cs:128）
System.Collections.Generic.List`1[UnityEditor.PluginImporter]…ctor（IEnumerable`1 collection）（at/Users/builduser/buildslave/mono运行时和classlibs/build/mcs/class/corlib/System.Collections.Generic/List.cs:65）
System.Linq.Enumerable.ToArray[PluginImporter]（IEnumerable`1源）
UnityEditor.PluginImporter.GetImporters（System.String platformName）（位于C:/buildslave/unity/build/artifacts/generated/common/editor/PluginImporterBindings.gen.cs:103）
UnityEditor.PluginImporter.GetImporters（构建目标平台）（位于C:/buildslave/unity/build/artifacts/generated/common/editor/PluginImporterBindings.gen.cs:111）
UnityEditor.AndroidPluginImporterExtension.CheckFileCollisions（System.String buildTargetName）
UnityEditorInternal.PluginsHelper.CheckFileCollisions（BuildTarget-BuildTarget）（位于C:/buildslave/unity/build/Editor/Mono/Plugins/PluginsHelper.cs:25）
UnityEditor.BuildPlayerWindow:BuildPlayerAndRun（）

请检查您所处的平台是否正确（内置设置）

如果可以，请尝试关闭Unity，然后手动删除库文件夹（在项目目录中），然后重新打开（重建）Unity项目。我注意到，在这些类型的错误中，这种方法有时对我有效

---

我希望这有帮助

让我们尝试删除库文件夹并重新生成此项目。希望这对你有用me@SyedMuhammadSalmanShah我很高兴，伙计。你介意选择我的回答作为答案吗？谢谢