[Python] Dash hello World doesn't show anything

I'm trying to get started with Dash but even the hello World example doesn't show up on two different laptops under Windows 11 started from within Visual Studio 2022

"my" code

# https://dash.plotly.com/tutorial
from dash import Dash, html

app = Dash(__name__)

app.layout = html.Div([
html.Div(children='Hello World')
])

if __name__ == '__main__':
app.run()


If I 'Start without debugging' the following appears in the command window

If I 'Start with debugging' I get

and if I start with app.run(debug=True) I don't get any further than

Examples I found that should display a figure in a browser but those do not work either.

I also tried

if __name__ == '__main__':
app.run(host="127.0.0.1", port=5000)


What am I missing that makes that I don't see any output?

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