I get this spammed to my window when I create a TrueSync manager then add players to it as they login:
NullReferenceException: Object reference not set to an instance of an object
TrueSync.TrueSyncManagedBehaviour.OnSyncedStart ()
TrueSync.TrueSyncManager.OnGameStarted () (at Assets/Standard Assets/TrueSync/Unity/TrueSyncManager.cs:838)
TrueSync.AbstractLockstep.Run ()
TrueSync.AbstractLockstep.RunSimulation (Boolean firstRun)
TrueSync.AbstractLockstep.CheckGameStart ()
TrueSync.AbstractLockstep.Update ()
TrueSync.TrueSyncManager.FixedUpdate () (at Assets/Standard Assets/TrueSync/Unity/TrueSyncManager.cs:697)