RPC and CMDs not getting fired, script has local player authority but doesn't have authority?

Having some trouble with authority.

In my canvas I've 2 UI elements. A chat window which is an image with some text on top for username and message. The image scrolls to the left over time. The other UI element is an input field.

The chat has a chat class which I've posted some methods of below.

The objective is simply: A player types a message, hits enter which fires ClientSide() which calls CmdSendMessage() which calls RpcSendMessageToClients().

This works for the host but not for connecting clients. Connecting clients get the message "Trying to send command for object without authority." which directs me to

CmdSendMessage(m_chatInputField.text);

in the ClientSend method.

The chat class (which again has all the code seen below) has local authority.

I think this code was working yesterday, so why it's not working now I have no idea. If anyone can shed some light on what I'm doing wrong I'd be very grateful.

Code (CSharp):

1. public void ClientSend()
2.     {
3.         if(isClient)
4.         {
5.             if(m_chatInputField.text.Contains("\n"))
6.             {
7.                 CmdSendMessage(m_chatInputField.text);
8.                 m_chatInputField.text = string.Empty;
9.                 m_chatInputField.DeactivateInputField();
10.             }
11.         }
12.     }
13.  
14.     [Command]
15.     void CmdSendMessage(string message)
16.     {
17.         //execute on server
18.         m_message_message.text = message;
19.         rTransform.position = startPosition;
20.         timer = interval;
21.  
22.         RpcSendMessageToClients(message);
23.     }
24.  
25.     [ClientRpc]
26.     void RpcSendMessageToClients(string message)
27.     {
28.         //execute on client
29.         m_message_message.text = message;
30.         rTransform.position = startPosition;
31.         timer = interval;
32.     }

 

https://docs.unity3d.com/ScriptReference/Networking.NetworkIdentity.AssignClientAuthority.html