Unable to connect signalr hub with jwt authentication

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[2025-11-19T14:03:33.645Z] Error: Failed to start the transport 'WebSockets': Error: WebSocket failed to connect. The connection could not be found on the server, either the endpoint may not be a SignalR endpoint, the connection ID is not present on the server, or there is a proxy blocking WebSockets. If you have multiple servers check that sticky sessions are enabled.

this.hubConnection = new signalR.HubConnectionBuilder()
.withUrl(
`${environment.serviceUrl}/hubs/notifications?userId=${userId}&applicationId=${applicationId}`,
{
accessTokenFactory: () => {
return this.authService.idToken;
},

transport: signalR.HttpTransportType.WebSockets

}
)
.withAutomaticReconnect()
.configureLogging(signalR.LogLevel.Debug)
.build();

this.hubConnection
.start()
.then(() => console.log('[SignalR] Connected'))
.catch(err => console.error('[SignalR] Connection error:', err));
}


I have already allowed cores

services.AddCors(o => o.AddPolicy("AllowCors", builder =>
{
builder.SetIsOriginAllowed(origin => true)
.AllowAnyMethod()
.AllowAnyHeader()
.AllowCredentials();
}));


and same thing when i am doing with application which does not use any auth, it works.

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