SEDS Projector crash log

2018-08-02 15:29:22.247 - Thread:   6 ->  Exception occured: System.NullReferenceException: Object reference not set to an instance of an object.
   at Sandbox.Game.Entities.Blocks.MyProjectorBase.previewGrid_OnBlockAdded(MySlimBlock obj)
   at System.Action`1.Invoke(T obj)
   at System.DelegateExtensions.InvokeIfNotNull[T1](Action`1 handler, T1 arg1)
   at Sandbox.Game.Entities.MyCubeGrid.NotifyBlockAdded(MySlimBlock block)
   at Sandbox.Game.Entities.MyCubeGrid.AddCubeBlock(MyObjectBuilder_CubeBlock objectBuilder, Boolean testMerge, MyCubeBlockDefinition blockDefinition)
   at Sandbox.Game.Entities.MyCubeGrid.AddBlock(MyObjectBuilder_CubeBlock objectBuilder, Boolean testMerge)
   at Sandbox.Game.Entities.MyCubeGrid.BuildBlock(MyCubeBlockDefinition blockDefinition, Vector3 colorMaskHsv, Vector3I min, Quaternion orientation, Int64 owner, Int64 entityId, MyEntity builderEntity, MyObjectBuilder_CubeBlock blockObjectBuilder, Boolean updateVolume, Boolean testMerge, Boolean buildAsAdmin)
   at Sandbox.Game.Entities.MyCubeGrid.BuildBlockSuccess(Vector3 colorMaskHsv, MyBlockLocation location, MyObjectBuilder_CubeBlock objectBuilder, Nullable`1& resultBlock, MyEntity builder, Boolean instantBuilt, Int64 ownerId)
   at Sandbox.Game.Entities.MyCubeGrid.BuildBlockRequest(UInt32 colorMaskHsv, MyBlockLocation location, MyObjectBuilder_CubeBlock blockObjectBuilder, Int64 builderEntityId, Boolean instantBuild, Int64 ownerId)
   at lambda_method(Closure , MyCubeGrid , UInt32 , MyBlockLocation , MyObjectBuilder_CubeBlock , Int64 , Boolean , Int64 )
   at VRage.Network.CallSite`7.Invoke(BitStream stream, Object obj, Boolean validate)
   at VRage.Network.MyReplicationLayer.Invoke(CallSite callSite, BitStream stream, Object obj, EndpointId source, MyClientStateBase clientState, Boolean validate)
   at VRage.Network.MyReplicationServer.OnEvent(MyPacketDataBitStreamBase data, CallSite site, Object obj, IMyNetObject sendAs, EndpointId source)
   at VRage.Network.MyReplicationLayer.OnEvent(MyPacketDataBitStreamBase data, NetworkId networkId, NetworkId blockedNetId, UInt32 eventId, EndpointId sender)
   at VRage.Network.MyReplicationLayer.ProcessEvent(MyPacketDataBitStreamBase data, EndpointId sender)
   at VRage.Network.MyReplicationLayer.OnEvent(MyPacket packet)
   at Sandbox.Engine.Multiplayer.MyTransportLayer.ProcessMessage(MyPacket p)
   at Sandbox.Engine.Multiplayer.MyTransportLayer.HandleMessage(MyPacket p)
   at Sandbox.Engine.Networking.MyReceiveQueue.Process(NetworkMessageDelegate handler)
2018-08-02 15:29:22.247 - Thread:   6 ->  Packet processing error, disconnecting #