Pollen card for Tomorrow.io integration

[Wesleyl89]

No description provided.

[sjoshua270]

I am having trouble getting this to work.
This is what I have in my welcome-header.yaml:

- type: "custom:button-card"
  template: custom_card_wsly_pollen
  variables:
    custom_card_wsly_pollen_tree: sensor.tomorrow_io_home_tree_pollen_index
    custom_card_wsly_pollen_grass: sensor.tomorrow_io_home_grass_pollen_index
    custom_card_wsly_pollen_weed: sensor.tomorrow_io_home_weed_pollen_index
    custom_card_wsly_pollen_tree_icon: mdi:tree
    custom_card_wsly_pollen_grass_icon: mdi:grass
    custom_card_wsly_pollen_weed_icon: mdi:flower-pollen

I was getting errors about missing icons, so I included the icons manually. Now, my error is:

TypeError: Cannot read properties of undefined (reading 'state') in 
'let pollen_state_label = variables.custom_card_wsly_pollen_none;
  if (entity.state == "very_low")...'

I copy-pasted the custom_card_wsly_pollen folder from GitHub, so I am fairly sure I'm not missing any code.