ArgumentException: The Object you want to instantiate is null.
UnityEngine.Object.CheckNullArgument (System.Object arg, System.String message) (at /Users/builduser/buildslave/unity/build/Runtime/Export/UnityEngineObject.cs:239)
UnityEngine.Object.Instantiate (UnityEngine.Object original) (at /Users/builduser/buildslave/unity/build/Runtime/Export/UnityEngineObject.cs:175)
UI.UpgradeCardPanel.OnUpdateInfo (System.Object obj) (at Assets/Scripts/UI/UpgradeCardsPanel/UpgradeCardPanel.cs:66)
UpdatableBaseWindow.UpdateInfo (System.Object obj) (at Assets/Scripts/UI/UpdatableBaseWindow.cs:12)
WindowsManager.ShowWindow[UpgradeCardPanel] (System.Object updateInfo) (at Assets/Scripts/UI/WindowsManager.cs:44)
CollectionCardsPanel.Update () (at Assets/Scripts/UI/CollectionCardsPenel/CollectionCardsPanel.cs:155)