I keep getting dsync every turn on multiplayer. Then I get this error and am forced to close the entire game. I have found no way to fix this, please could somebody help. 

NullReferenceException: Object reference not set to an instance of an object
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PirateCouncil.UpdateUniqueFacilitiesOwned (.PointOfInterest facility)
PirateCouncil.UnlockFacility (.PointOfInterest facility)
PirateCouncil.UpdateFortressesState ()
PirateCouncil+<GameClientState_Turn_Begin_UpdateFortressesState>c__Iterator26E.MoveNext ()
Amplitude.Coroutine.Run ()
GameClientState_Turn_Begin.Run ()
Amplitude.Unity.Framework.FiniteStateMachine.Update ()
GameInterface.Update ()
Session.Update ()
Amplitude.Unity.Session.SessionManager.LateUpdate ()

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V1.5.7 S3 (64-bit)

Does this happen even if you start a completely new game?

Can you please attach a savegame file from where the above error occurs?

Unfortunately not as we deleted this save game. We started a new game and have discovered that loading up a auto save works perfectly. We no longer manually save the game cause of this, which is a bit of a downer but is certainly better than not being able to play the game.  

I have encountered some other issues but I want to see if they are a reoccurring problem, if they are I will update you. 

Thanks for the quick reply. 

Ok so it seems that there is another issue that has popped up please see below. 

NullReferenceException: Object reference not set to an instance of an object
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PlayerControllerRepository.SetActivePlayerController (.PlayerController playerController)
GameClientState_GameLaunched.Begin (System.Object[] parameters)
Amplitude.Unity.Framework.FiniteStateMachine.Update ()
GameInterface.Update ()
Session.Update ()
Amplitude.Unity.Session.SessionManager.LateUpdate ()

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V1.5.7 S3  (32-bit)

This prevents me from joining the game completely now!

This was after a memory serious error that I didn't copy unfortunately, any ideas??? 

Did you try any of the "standard stuff" ?

- verify the Steam game cache

- un-install and then re-install the game

- do a clean Windows boot (https://support.microsoft.com/en-us/kb/929135) ?

- try testing your RAM modules by running MemTest ? (http://www.memtest86.com/ or http://www.memtest.org/) ?