![]() This error can also happen during the negotiate request. ![]() ![]() When using WebSockets and skipNegotiation = true WebSocket connection to 'ws://xxx/HubName' failed: Error during WebSocket handshake: Unexpected response code: 307 ![]() This error is usually caused by a client using only the WebSockets transport but the WebSocket protocol isn't enabled on the server. If the connection uses the ID and takes too long to send a request to the server after the negotiate, the server:įor the following error: WebSocket connection to 'wss://xxx/HubName' failed: Error during WebSocket handshake: Unexpected response code: 400Įrror: Failed to start the connection: Error: There was an error with the transport. For example, the server is hosted at and client is trying to connect to. Verify the client is connecting to the correct endpoint. The other server is not aware of the previous connection. When using multiple servers without sticky sessions, the connection can start on one server and then switch to another server. When using WebSockets and skipNegotiation = true WebSocket connection to 'wss://xxx/HubName' failed: Error during WebSocket handshake: Unexpected response code: 404 This section provides help with errors that can occur when trying to establish a connection to an ASP.NET Core SignalR hub.
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