Conditional row inside entities card says no card type configured?

I’m using an Entities card with one entity (Tasmota on/off switch), but then if the switch is on, I’d like to use the device tracker entity (from Unifi) to display the IP address, but there is an error saying No card type configured?

type: entities
entities:
  - entity: switch.mister_basement
  - type: conditional
    conditions:
      - entity: switch.mister_basement
        state: 'on'
    row:
      - entity: device_tracker.mister_downstairs
        type: attribute
        attribute: ip

row takes a map. You’re trying to give it a list.

That worked. Thanks very much!