error IOS

NotSupportedException: /Users/builduser/buildslave/unity/build/External/il2cpp/il2cpp/libil2cpp/icalls/mscorlib/System.Reflection.Emit/DynamicMethod.cpp(19) : Unsupported internal call for IL2CPP:DynamicMethod::create_dynamic_method - System.Reflection.Emit is not supported.
  at System.Reflection.Emit.DynamicMethod.CreateDynMethod () [0x00000] in <filename unknown>:0
  at System.Reflection.Emit.DynamicMethod.CreateDelegate (System.Type delegateType) [0x00000] in <filename unknown>:0
  at fastJSON.Reflection.CreateGetMethod (System.Type type, System.Reflection.PropertyInfo propertyInfo) [0x00000] in <filename unknown>:0
  at fastJSON.Reflection.GetGetters (System.Type type, Boolean ShowReadOnlyProperties, System.Collections.Generic.List`1 IgnoreAttributes) [0x00000] in <filename unknown>:0
  at fastJSON.JSONSerializer.WriteObject (System.Object obj) [0x00000] in <filename unknown>:0
  at fastJSON.JSONSerializer.WriteValue (System.Object obj) [0x00000] in <filename unknown>:0
  at fastJSON.JSONSerializer.ConvertToJSON (System.Object obj) [0x00000] in <filename unknown>:0
  at fastJSON.JSON.ToNiceJSON (System.Object obj, fastJSON.JSONParameters param) [0x00000] in <filename unknown>:0
  at LandingMenu.Login () [0x00000] in <filename unknown>:0
  at UnityEngine.Events.InvokableCallList.Invoke (System.Object[] parameters) [0x00000] in <filename unknown>:0
  at UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.EventFunction`1 functor) [0x00000] in <filename unknown>:0
  at UnityEngine.EventSystems.StandaloneInputModule.ProcessTouchPress (UnityEngine.EventSystems.PointerEventData pointerEvent, Boolean pressed, Boolean released) [0x00000] in <filename unknown>:0
  at UnityEngine.EventSystems.StandaloneInputModule.ProcessTouchEvents () [0x00000] in <filename unknown>:0
  at UnityEngine.EventSystems.StandaloneInputModule.Process () [0x00000] in <filename unknown>:0
UnityEngine.EventSystems.ExecuteEvents:Execute(GameObject, BaseEventData, EventFunction`1)
UnityEngine.EventSystems.StandaloneInputModule:ProcessTouchPress(PointerEventData, Boolean, Boolean)
UnityEngine.EventSystems.StandaloneInputModule:ProcessTouchEvents()
UnityEngine.EventSystems.StandaloneInputModule:Process()

(Filename: currently not available on il2cpp Line: -1)