ArgumentException: An item with the same key has already been added. Key: Assembly-CSharp

Hey buddy, I encountered the following error when using Meta XR SDK v78 in Unity and don't know how to fix it. I also encountered this issue with v77: the project was running normally just a moment ago, but after restarting the project, this error pops up. I can fix it by deleting the Library folder in the project directory, but I want to know if there are any other simpler solutions. Does anyone know how to do this?

ArgumentException: An item with the same key has already been added. Key: Assembly-CSharp
System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
Meta.Conduit.Editor.AssemblyWalker..ctor (System.Collections.Generic.IList`1[T] assemblies, System.Collections.Generic.IEnumerable`1[T] compilationAssemblies) (at ./Library/PackageCache/com.meta.xr.sdk.voice@78.0.0/Lib/Wit.ai/Scripts/Editor/Conduit/AssemblyWalker.cs:65)
Meta.WitAi.Windows.ConduitManifestGenerationManager..ctor () (at ./Library/PackageCache/com.meta.xr.sdk.voice@78.0.0/Lib/Wit.ai/Scripts/Editor/Utility/ConduitManifestGenerationManager.cs:69)
System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic, System.Boolean wrapExceptions) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
System.RuntimeType.CreateInstanceSlow (System.Boolean publicOnly, System.Boolean wrapExceptions, System.Boolean skipCheckThis, System.Boolean fillCache) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Boolean wrapExceptions, System.Threading.StackCrawlMark& stackMark) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic, System.Boolean wrapExceptions) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
System.Activator.CreateInstance (System.Type type) (at <356d430fdcb04bbf8dc54776e1d3627f>:0)
UnityEditor.Build.BuildPipelineInterfaces.AddToListIfTypeImplementsInterface[T] (System.Type t, System.Object& o, System.Collections.Generic.List`1[T]& list) (at <2f20f957c29d4173a2fb958401c4a8bd>:0)
UnityEditor.Build.BuildPipelineInterfaces.InitializeBuildCallbacks (UnityEditor.Build.BuildPipelineInterfaces+BuildCallbacks findFlags) (at <2f20f957c29d4173a2fb958401c4a8bd>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)