Unity 2019.4 shows a SerializationException when starting up.

[zwcloud]

MeshTerrainEditor 4.0.7

SerializationException: Unable to find assembly 'UnityEditor.CoreModule, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'. System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo.GetAssembly () (at :0) System.Runtime.Serialization.Formatters.Binary.ObjectReader.GetType (System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo assemblyInfo, System.String name) (at :0) System.Runtime.Serialization.Formatters.Binary.ObjectMap..ctor (System.String objectName, System.String[] memberNames, System.Runtime.Serialization.Formatters.Binary.BinaryTypeEnum[] binaryTypeEnumA, System.Object[] typeInformationA, System.Int32[] memberAssemIds, System.Runtime.Serialization.Formatters.Binary.ObjectReader objectReader, System.Int32 objectId, System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo assemblyInfo, System.Runtime.Serialization.Formatters.Binary.SizedArray assemIdToAssemblyTable) (at :0) System.Runtime.Serialization.Formatters.Binary.ObjectMap.Create (System.String name, System.String[] memberNames, System.Runtime.Serialization.Formatters.Binary.BinaryTypeEnum[] binaryTypeEnumA, System.Object[] typeInformationA, System.Int32[] memberAssemIds, System.Runtime.Serialization.Formatters.Binary.ObjectReader objectReader, System.Int32 objectId, System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo assemblyInfo, System.Runtime.Serialization.Formatters.Binary.SizedArray assemIdToAssemblyTable) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryParser.ReadObjectWithMapTyped (System.Runtime.Serialization.Formatters.Binary.BinaryObjectWithMapTyped record) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryParser.ReadObjectWithMapTyped (System.Runtime.Serialization.Formatters.Binary.BinaryHeaderEnum binaryHeaderEnum) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryParser.Run () (at :0) System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize (System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Runtime.Serialization.Formatters.Binary.BinaryParser serParser, System.Boolean fCheck, System.Boolean isCrossAppDomain, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Boolean fCheck, System.Boolean isCrossAppDomain, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Boolean fCheck, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Boolean fCheck) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream) (at :0) UnityEditor.Scripting.APIUpdater.AssemblyDependencyGraph.LoadFrom (System.IO.Stream stream) (at <7105be432fb64891b07085914e6cd5c1>:0) UnityEditorInternal.APIUpdating.APIUpdaterManager.ReadOrCreateAssemblyDependencyGraph (System.String assemblyDependencyGraphFilePath) (at <7105be432fb64891b07085914e6cd5c1>:0) UnityEditorInternal.APIUpdating.APIUpdaterManager.UpdateDependencyGraph (System.Collections.Generic.IEnumerable`1[T] addedAssemblyPaths) (at <7105be432fb64891b07085914e6cd5c1>:0) UnityEditorInternal.APIUpdating.APIUpdaterManager.ProcessImportedAssemblies (System.String[] assemblies) (at <7105be432fb64891b07085914e6cd5c1>:0) UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

[zwcloud]

This is caused by Unity's APIUpdater. So we can not nothing to solve this error prompt.

This error doesn't have bed effect on functionality of MTE and can be ignored safely.