Adding a 2nd machine

I apologize for the simplicity of this question, but searching the forums has not yielded an answer for me as yet.

I have tailscale installed on two machines, one of which is a headless machine I want to access while on the road. I have just one account/email tied to tailscale.

I cannot find a way to add the 2nd machine to that account. It is installed and I’m logged in, and I see the 1st machine listed on the Machines page but see no option to add the 2nd machine.

What am I missing?

SOLVED: Unclear why, but uninstalling and reinstalling has allowed both machines to now appear in the list.