I received two errors during gameplay. First was

[Unity] NullReferenceException: Object reference not set to an instance of an object
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  at UnityEngineLogCallback in Error while parsing stackframe: Fleet.IGalaxyEntityMappingOverride.TryResolve (Amplitude.Unity.Framework.InterpreterContext& context):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: GalaxyFleet.UpdateVisual ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: GalaxyFleet.Fleet_OnShipCollectionChanged (System.Object sender, System.ComponentModel.CollectionChangeEventArgs e):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Garrison.NotifyShipCollectionChange (CollectionChangeAction action, .Ship ship):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Fleet.NotifyShipCollectionChange (CollectionChangeAction action, .Ship ship):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Garrison.RemoveShip (.Ship ship, Boolean notify):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Mothership.OnMothershipWrecked (.GameNode node):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: DepartmentOfDefense+<WreckMothershipProcessor>c__Iterator16B.MoveNext ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Amplitude.Coroutine.Run ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: GameClient.ProcessOrders ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: GameInterface.UpdateMessageBoxAndProcessOrders ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: GameClient.UpdateMessageBoxAndProcessOrders ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: GameInterface.Update ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Session.Update ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Amplitude.Unity.Session.SessionManager.LateUpdate ():line 0

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V0.1.23 S0 ALPHA-Public (64-bit)

The other was 

[Unity] NullReferenceException: Object reference not set to an instance of an object
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  at UnityEngineLogCallback in Error while parsing stackframe: HeroShip.ReceiveExperienceFromOtherHalf (Single value):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Hero.OnExperienceGained (Single value):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Hero.SetPropertyBaseValue (Amplitude.StaticString propertyName, Single value):line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Hero.ComputePerTurnProperties ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: DepartmentOfEducation+<GameClientState_Turn_End_ComputeHeroesProperties>c__Iterator1A2.MoveNext ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Amplitude.Coroutine.Run ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: GameClientState_Turn_End.Run ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Amplitude.Unity.Framework.FiniteStateMachine.Update ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: GameInterface.Update ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Session.Update ():line 0
  at UnityEngineLogCallback in Error while parsing stackframe: Amplitude.Unity.Session.SessionManager.LateUpdate ():line 0

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V0.1.23 S0 ALPHA-Public (64-bit)

not sure what to do with it. Just started playing the EA a couple days ago.