When the scaffolding for both client and server is set up for SignalR. The first thing on the client side is to attempt to connect to the Hub.

Negotiate Error

Our first attempt to connect to the server hub.

Analysis

//But chrome showed this
Request URL: https://localhost:8081/Hub/ClientStatus/negotiate
Response: XHR negotiate (failed) ERR_CONNECTION_REFUSED xhr
// do not use this one in a .net core application!
npm i @asp.net/signalr
// Use this one.
npm i @microsoft/signalr
    
Make sure your server is up an running. If negotiation attempts show red, nobody is responding! 
JWP2020 npm i @microsoft/signalr
      
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