Theres a bug with the 2nd scenario.

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Exception has been thrown by the target of an invocation.

An item with the same key has already been added. Key: Amplitude.Mercury.Interop.ArmyLostAtSeaDestroyedNotificationData

  at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x00000] in <00000000000000000000000000000000>:0 

  at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in <00000000000000000000000000000000>:0 

  at Amplitude.Mercury.Simulation.DepartmentOfCommunication.GenerateNotificationPriorityDictionnary () [0x00000] in <00000000000000000000000000000000>:0 

  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <00000000000000000000000000000000>:0 

  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <00000000000000000000000000000000>:0 

  at Amplitude.Mercury.Sandbox.Sandbox.ThreadStart (System.Object parameter) [0x00000] in <00000000000000000000000000000000>:0 

  at ZenFulcrum.EmbeddedBrowser.BrowserNative+MessageFunc.Invoke (System.String message) [0x00000] in <00000000000000000000000000000000>:0 

  at ZenFulcrum.EmbeddedBrowser.BrowserNative+MessageFunc.Invoke (System.String message) [0x00000] in <00000000000000000000000000000000>:0 

  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <00000000000000000000000000000000>:0 

  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) [0x00000] in <00000000000000000000000000000000>:0 

  at ZenFulcrum.EmbeddedBrowser.BrowserNative+MessageFunc.Invoke (System.String message) [0x00000] in <00000000000000000000000000000000>:0 

Hi,

Sorry for the inconvenience. Please could you verify the integrity of your game files?
You  may have to clear your Steam download cache as well.