System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object
  at AssemblyUpdater.Steps.MemberReferenceReplacer.MemberReferenceReplacementForProperty (Mono.Cecil.MethodReference method) [0x00000] in <filename unknown>:0
  at AssemblyUpdater.Steps.MemberReferenceReplacer.MemberReferenceReplacementFor (Mono.Cecil.MethodReference methodReference) [0x00000] in <filename unknown>:0
  at AssemblyUpdater.Steps.MemberReferenceReplacer.Visit (Mono.Cecil.MethodReference methodReference, Unity.Cecil.Visitor.Context context) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Visitor.Visit (Mono.Cecil.Cil.Instruction instruction, Unity.Cecil.Visitor.Context context) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Visitor.Visit (Mono.Cecil.Cil.MethodBody methodBody, Unity.Cecil.Visitor.Context context) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Visitor.Visit (Mono.Cecil.MethodDefinition methodDefinition, Unity.Cecil.Visitor.Context context) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Visitor.Visit (Mono.Cecil.TypeDefinition typeDefinition, Unity.Cecil.Visitor.Context context) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Visitor.Visit (Mono.Cecil.ModuleDefinition moduleDefinition, Unity.Cecil.Visitor.Context context) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Visitor.Visit (Mono.Cecil.AssemblyDefinition assemblyDefinition, Unity.Cecil.Visitor.Context context) [0x00000] in <filename unknown>:0
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Visitor.Visit[AssemblyDefinition] (Mono.Cecil.AssemblyDefinition node, Unity.Cecil.Visitor.Context context) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Extensions.DoAccept[AssemblyDefinition] (Mono.Cecil.AssemblyDefinition definition, Unity.Cecil.Visitor.Visitor visitor) [0x00000] in <filename unknown>:0
  at Unity.Cecil.Visitor.Extensions.Accept (Mono.Cecil.AssemblyDefinition assemblyDefinition, Unity.Cecil.Visitor.Visitor visitor) [0x00000] in <filename unknown>:0
  at AssemblyUpdater.Steps.AssemblyUpdaterStepBase.Apply (AssemblyUpdater.Core.AssemblyUpdaterContext context) [0x00000] in <filename unknown>:0
  at AssemblyUpdater.Core.AssemblyUpdaterPipeline.Run (AssemblyUpdater.Core.AssemblyUpdaterContext context) [0x00000] in <filename unknown>:0
  at AssemblyUpdater.Application.Program.CheckForObsoleteAPIUsage (AssemblyUpdater.Application.CommandLineSpec config) [0x00000] in <filename unknown>:0
  at AssemblyUpdater.Application.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0
UnityEditor.Scripting.APIUpdaterHelper:DoesAssemblyRequireUpgrade(String)