Unable to track flow in prefect cloud

[wasuratme96]

Hi Team,

I just start using prefect and try to follow all step in this tutorial.
Everything seem to be fine but when I try to run below script. It return me with

It return me with

raise HTTPStatusError(message, request=request, response=self)
httpx.HTTPStatusError: Client error '400 Bad Request' for url 'https://api-beta.prefect.io/api/accounts/c6d19fa2-f27e-4bf9-8bc9-bb64930b2283/workspaces/96c2ac26-a63d-4689-b95d-804924a9dcd0/flows/'
For more information check: https://httpstatuses.com/400

Here is my prefect version in conda environment.

Do I miss or mistake in any step? please kindly suggest.
Thanks !