How to add a member?

[psommerfeld]

I'm trying to follow https://docs.plane.so/core-concepts/workspaces/members to add a member. But what I see is in the pic attached.
I have no opp'ty to add an email address for a member like I see in the docs, but only to somehow search for a member from a non-existent drop-down list that I don't know how to create.
TIA!