Exception has been thrown by the target of an invocation.

An item with the same key has already been added. Key: Amplitude.Mercury.StateShare.EventCompleteNotificationData

  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 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.Wwise.Interop.AkLogger+ErrorLoggerInteropDelegate.Invoke (System.String message) [0x00000] in <00000000000000000000000000000000>:0 

  at System.AsyncCallback.Invoke (System.IAsyncResult ar) [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 Amplitude.Wwise.Interop.AkLogger+ErrorLoggerInteropDelegate.Invoke (System.String message) [0x00000] in <00000000000000000000000000000000>:0 

I got this error a while ago too while trying to load an autosave. The only fix I had was to close the game and reopen it.