Browser Mod Pop-up

Configuration
1

I am searching and trying all sorts of things to get the browser mod pop-up to work but it seems there are changes in the integration or in HA that makes it difficult for me because every tutorial says something else.

I want to show a pop-up on an entity light.mylight. I added a pop-up card to my configuration:

type: custom:popup-card
entity: light.mylight
card:
  type: vertical-stack
  cards:
    - type: custom:mushroom-light-card
      entity: light.mylight
      show_brightness_control: true
      show_color_temp_control: true
      show_color_control: true
      collapsible_controls: true
      use_light_color: true
    - type: custom:mushroom-light-card
      entity: light.mylight2
      ...

I added this action on the light entity:
image

But I am not sure what to enter in these fields:

image
image476×575 8.31 KB

What am I doing wrong? And is there a clear (noob) tutorial for this?