Error when Reading/Writing to Cloud - (CloudStorage.Save error: notify_write_cb failed)

Hi,

We're currently working towards the 1.0 release of our game thats been in early access for the past few months. When testing the other day, one of our artists got and error when loading from the cloud using CloudStorage.Load(), then, when trying to create a new save he got another error (CloudStorage.Save error: notify_write_cb failed). The only thing that fixed the error was going into the live version of the game and clearing all save data. We've had a look through our save/load code and can't find anything wrong, so I was wondering if anyone has any ideas what causes this error and any potential fixes.

Thanks

Full error log: 

<color=orange><LoadOnline>b__9_0 : Error loading from cloud, creating new profile</color>

UnityEngine.Logger:Log(LogType, Object)

UnityEngine.Debug:Log(Object)

SaveOculus:<LoadOnline>b__9_0(Message`1)

Oculus.Platform.Callback:Invoke(Message`1)

Oculus.Platform.RequestCallback`1:HandleMessage(Message)

Oculus.Platform.Callback:HandleMessage(Message)

Oculus.Platform.Request:RunCallbacks(UInt32)

(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 48)

<color=orange>Invoke : CloudStorage.Save error: notify_write_cb failed (1971005)</color>

UnityEngine.Logger:Log(LogType, Object)

UnityEngine.Debug:Log(Object)

Oculus.Platform.Callback:Invoke(Message`1)

Oculus.Platform.RequestCallback`1:HandleMessage(Message)

Oculus.Platform.Callback:HandleMessage(Message)

Oculus.Platform.Request:RunCallbacks(UInt32)