I’ve copy pasted the “Minimal App” example (https://dash.plotly.com/minimal-app) to my local machine, but when I try to run it, I get the following error:
ConnectionResetError: [Errno 104] Connection reset by peer
There is no other output, so I can’t tell what port Dash is trying to access.
Could you give some more info on how you’re running the example?
I think that error is showing in the browser. If you’re on Windows and run it, say, in a Powershell (other and much better options are available), you should see more messages in the Powershell window, including what port it is using.