help with global popups

[AalianKhan]

Hello
I have been trying to make global popups. Everything works when I don't put variables

I want to put the entity variable so I can use it for my other lights like in the example in the docs

Here is my config for the popup.yaml

type: entities
show_header_toggle: false
entities:
  - entity: {{ entity }}
  - type: 'custom:rgb-light-card'
    entity: {{ entity }}
    justify: around
    colors:
      - white_value: 225
        brightness: 225
        icon_color: white
      - rgb_color:
          - 234
          - 136
          - 140
        brightness: 225
      - rgb_color:
          - 251
          - 180
          - 140
        brightness: 225
      - rgb_color:
          - 135
          - 198
          - 237
        brightness: 225
      - rgb_color:
          - 139
          - 231
          - 185
        brightness: 225
      - rgb_color:
          - 249
          - 222
          - 139
        brightness: 225

But I get this when I reload I get this error