Catch/ignore NetworkManager.StartHost error

Naturally when I call StartHost twice on the same pc I get an error that port is already in use. I'd like to know if there is a way to silence this error. Currently I've created simple script which i've added to my scene to speed up testing (so I can launch game and skip the entry menu). But when I hit play in unity editor it stops on the start host error. Then i can unpause game and it continues normally. It's kind of annoying I'm getting the error and I have to hit "unpause" every time. Is there any way to catch new networking errors? Because try/catch does not seem to work.

 public class TestGameStarter : MonoBehaviour {
 
     private NetworkManager networkManager;
 
     void Start () {
         networkManager = GameObject.FindWithTag(Tags.NETWORK_MANAGER).GetComponent<NetworkManager>();
 
         if(networkManager.client == null)
         {
             networkManager.StartupHost();
             if(networkManager.client) {
                 NetworkManager.singleton.networkAddress = "<removed>";
                 networkManager.JoinGame();
             }
         }
     }
 }