"No Audio" - but one-sided

[AnnRum]

Wait - who is not hearing who?  Are you on a Mac?

We're both on windows.

If I set up the session - my Dad can join & I have audio from him.

If my Dad sets up the session, I can join, but I don't get audio from him.

For both of us, if we run the test through a solo session, we have audio.