UWP error in two machines

Hello.

I'm trying to compile a game that comes from PC standalone and there works well. I have cleaned all the stuff that could be related to problems, even just created a clean scene and deactivate the other scenes to generate a UWP. But a problem persists, the same in two machines, one with VS2019 updated and the other with VS2017 and VS2019 updated. It happens with Unity 2020.3.3. and 2021.1.1.

Fact: if I create a new scene from scratch then it goes well.

The output is this:

Exception: IL2CPP error (no further information about what managed code was being converted is available)
System.NullReferenceException: Object reference not set to an instance of an object.
at Unity.IL2CPP.Extensions.ModuleInitializerMethod(AssemblyDefinition assembly)
at Unity.IL2CPP.Metadata.PerAssemblyCodeMetadataWriter.Write(SourceWritingContext context, AssemblyDefinition assembly, GenericContextCollection genericContextCollection, String assemblyMetadataRegistrationVarName, String codeRegistrationVarName)
at Unity.IL2CPP.AssemblyConversion.SecondaryWrite.Steps.PerAssembly.WritePerAssemblyCodeMetadata.ProcessItem(GlobalWriteContext context, AssemblyDefinition item)
at Unity.IL2CPP.AssemblyConversion.Steps.Base.ScheduledItemsStepFuncWithContinueAction`3.WorkerWrapper(WorkItemData`3 workerData)
at Unity.IL2CPP.Contexts.Scheduling.PhaseWorkScheduler`1.ContinueWithResultsWorkItem`4.InvokeWorker(Object context, Int32 uniqueId)
at Unity.IL2CPP.Contexts.Scheduling.PhaseWorkScheduler`1.BaseContinueWorkItem`2.Invoke(Object context, Int32 uniqueId)
at Unity.IL2CPP.Contexts.Scheduling.PhaseWorkScheduler`1.WorkerLoop(Object data)
UnityEditorInternal.Runner.RunProgram (UnityEditor.Utils.Program p, System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser) (at <0c3742f371b24679bcaa6fcc508d0cca>:0)
UnityEditorInternal.Runner.RunManagedProgram (System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser, System.Action`1[T] setupStartInfo) (at <0c3742f371b24679bcaa6fcc508d0cca>:0)
UnityEditorInternal.IL2CPPBuilder.RunIl2CppWithArguments (System.Collections.Generic.List`1[T] arguments, System.Action`1[T] setupStartInfo, System.String generatedCppOutputDirectory) (at <0c3742f371b24679bcaa6fcc508d0cca>:0)
UnityEditorInternal.IL2CPPBuilder.ConvertPlayerDlltoCpp (UnityEditor.Il2Cpp.Il2CppBuildPipelineData data, System.String outputDirectory, System.Boolean platformSupportsManagedDebugging) (at <0c3742f371b24679bcaa6fcc508d0cca>:0)
UnityEditorInternal.IL2CPPBuilder.Run () (at <0c3742f371b24679bcaa6fcc508d0cca>:0)
UnityEditorInternal.IL2CPPUtils.RunIl2Cpp (System.String tempFolder, System.String stagingAreaData, UnityEditorInternal.IIl2CppPlatformProvider platformProvider, System.Action`1[T] modifyOutputBeforeCompile, UnityEditor.RuntimeClassRegistry runtimeClassRegistry) (at <0c3742f371b24679bcaa6fcc508d0cca>:0)
PostProcessWinRT.RunIL2CPPForProjectBuild () (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/PostProcessWinRT.cs:1909)
PostProcessWinRT.RunIL2CPP () (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/PostProcessWinRT.cs:1878)
PostProcessWinRT.Process () (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/PostProcessWinRT.cs:211)
UnityEditor.UWP.BuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ExtensionModule.cs:86)
Rethrow as BuildFailedException: Exception of type 'UnityEditor.Build.BuildFailedException' was thrown.
UnityEditor.UWP.BuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ExtensionModule.cs:90)
UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <0c3742f371b24679bcaa6fcc508d0cca>:0)
UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at <0c3742f371b24679bcaa6fcc508d0cca>:0)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr, Boolean&)


I've been working on this for two days complete with no solutions and trying to find something in Google. Any help would be most appreciated. Thank you.

 

Well after many tests I've found it was a problem related with an asset, asset upgraded and problem solved.

 

Certainly that was the issue, thank you.

 

Thanks Now the issue has been resolved for many ..... Thanks for your time...