Your Lightning node is running, but it has no payment channel yet. Receiving needs inbound liquidity — a channel with funds on the far side — otherwise any invoice you create is unpayable. Sending needs outbound liquidity — a funded channel to route through. Open one with Zeus Olympus from the channels screen — it's prefilled there, and needs 150,000–1,500,000 on-chain sats.
Lightning payments need a Lightning node that's actually running. Yours is installed but isn't running right now — start it from My Apps and try again.
Lightning payments need a Lightning node running on this Archipelago node. You don't have one installed yet — pick an implementation below and it'll be installed for you.
{{ node.blurb }}
{{ error }}
This takes a few minutes — the image has to be pulled and the node started. You can close this and carry on; the install keeps running.