Solve Unity Networking Error : Trying to send command for object without authority.

I'm trying to send a byte array (developing in Unity, C#) from my client to my server across a local network and I'm getting the error `Trying to send command for object without authority.` when multiple clients are connected to the server simultaneously. If I'm creating an object that's a serialized byte array, how do give it authority? The full error I'm getting is Trying to send command for object without authority. [login to view URL]:SendCommandInternal(NetworkWriter, Int32, String) Network_Transmitter:CallCmdPrepareToReceiveBytes(Int32, Int32) <DoSendBytes>c__Iterator0:MoveNext() (at Assets/Scripts/Networking/[login to view URL]) [login to view URL]:StartCoroutine(IEnumerator) Player_Data:PrepareServerData() (at Assets/Scripts/Player/[login to view URL]) Event_Manager:SendTextureData() (at Assets/Scripts/[login to view URL]) Game_UI:SendData() (at Assets/Scripts/[login to view URL]) [login to view URL]:Update() The entire project can be found here: [login to view URL]