Fatal error in Unity CIL Linker | Failed to resolve assembly : Unity.Tasks

Unity Engine
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1

Hi there,
I updated a Unity project from version 2018.2.8f1 to 2022.3.20f1 Lts, i encountered an error who block me. When i’m trying to build for Android this error appear :

Building Library\Bee\artifacts\Android\ManagedStripped failed with output:
C:\Program Files\Unity\Hub\Editor\2022.3.20f1\Editor\Data\il2cpp\build\deploy\UnityLinker.exe @Library\Bee\artifacts\rsp\1509391427145841519.rsp
Fatal error in Unity CIL Linker
Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'Unity.Tasks, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
   at Unity.IL2CPP.Common.MissingMethodStubber.GetTypeModule(TypeReference type, IEnumerable`1 assemblies)
   at Unity.Linker.Steps.AddUnresolvedStubsStep.MarkAssemblyOfType(UnityLinkContext context, TypeReference type)
   at Unity.Linker.Steps.Marking.UnresolvedStubMarking.HandleUnresolvedType(TypeReference reference)
   at Unity.Linker.Steps.UnityMarkStep.HandleUnresolvedType(TypeReference reference)
   at Mono.Linker.Steps.MarkStep.MarkType(TypeReference reference, DependencyInfo reason, IMemberDefinition sourceLocationMember)
   at Mono.Linker.Steps.MarkStep.MarkGenericArguments(IGenericInstance instance, IMemberDefinition sourceLocationMember)
   at Mono.Linker.Steps.MarkStep.GetOriginalType(TypeReference type, DependencyInfo reason, IMemberDefinition sourceLocationMember)
   at Mono.Linker.Steps.MarkStep.MarkType(TypeReference reference, DependencyInfo reason, IMemberDefinition sourceLocationMember)
   at Mono.Linker.Steps.MarkStep.MarkField(FieldDefinition field, DependencyInfo& reason)
   at Mono.Linker.Steps.MarkStep.MarkFields(TypeDefinition type, Boolean includeStatic, DependencyInfo& reason, Boolean markBackingFieldsOnlyIfPropertyMarked)
   at Mono.Linker.Steps.MarkStep.ApplyPreserveInfo(TypeDefinition type)
   at Mono.Linker.Steps.MarkStep.MarkType(TypeReference reference, DependencyInfo reason, IMemberDefinition sourceLocationMember)
   at Mono.Linker.Steps.MarkStep.MarkField(FieldDefinition field, DependencyInfo& reason)
   at Mono.Linker.Steps.MarkStep.MarkEntireTypeInternal(TypeDefinition type, Boolean includeBaseTypes, DependencyInfo& reason, IMemberDefinition sourceLocationMember, HashSet`1 typesAlreadyVisited)
   at Mono.Linker.Steps.MarkStep.MarkEntireAssembly(AssemblyDefinition assembly)
   at Mono.Linker.Steps.MarkStep.InitializeAssembly(AssemblyDefinition assembly)
   at Unity.Linker.Steps.UnityMarkStep.InitializeAssembly(AssemblyDefinition assembly)
   at Mono.Linker.Steps.MarkStep.Initialize()
   at Unity.Linker.Steps.UnityMarkStep.Process(LinkContext context)
   at Unity.Linker.UnityPipeline.ProcessStep(LinkContext context, IStep step)
   at Mono.Linker.Pipeline.Process(LinkContext context)
   at Unity.Linker.UnityDriver.UnityRun(UnityLinkContext context, UnityPipeline p, LinkRequest linkerOptions, TinyProfiler2 tinyProfiler, ILogger customLogger)
   at Unity.Linker.UnityDriver.RunDriverWithoutErrorHandling(TinyProfiler2 tinyProfiler, ILogger customLogger)
   at Unity.Linker.UnityDriver.RunDriverWithoutErrorHandling()
   at Unity.Linker.UnityDriver.RunDriver()

UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

I can’t find the solution for this error, could you please help me ?

2

If you see MissingMethodStubber in a call stack it means UnityLinker is failing to patch up something that is missing from an assembly. This most commonly happens when mixing assemblies that are no longer binary compatible, and the most common way that happens is if you have precompiled assemblies in the project. Do you have any precompiled assemblies in your project?

Based on the error it sounds like an assembly references an assembly called Unity.Tasks.dll but Unity.Tasks.dll does not eixst.