I am playing with the sample of A2A agent: https://github.com/microsoft/agent-framework/blob/main/python/samples/getting_started/agents/a2a/agent_with_a2a.py
And by running the sample, the A2A server is detected but no answer is returned:
I gave a try with a2a inspector and I have an answer:
So I guess the server is not the issue but someting in the Agent Framework.