MQTTnet.AspTestApp Fails to start

[grendo]

I have the latest code from the repo and tried to start the MQTTnet.AspTestApp project to test websockets.
I had to add a handler to the program.cs as ServiceCollectionExtensions.AddHostedMqttServer crashes if it is null

builder.Services.AddMqttServer(config => {

});

After that the server started but in the web page you get
mqtt.min.js:5 WebSocket connection to 'ws://localhost:5049/mqtt' failed:

[chkr1011]

The argument check is indeed wrong. I will remove it so that it will support null again as it was originally intended.

I tested with mqttMultimeter and I can connect with URI: localhost:5000/mqtt

Do you have some logs from mqtt.min why the connection has failed?