Mushroom card not shown

I’ve installed horseshoe card via HACS today.

A simple yaml entered via the GUI dashboard editor:

type: custom:flex-horseshoe-card
entities:
  - entity: sensor.meter_plus_da53_bluetooth_signal
    decimals: 1
    name: Lounge
    unit: °C
  - entity: sensor.meter_plus_da53_humidity
    decimals: 0
    unit: '%'
    icon: mdi:water-percent
show:
  horseshoe_style: lineargradient
layout:
  hlines:
    - id: 0
      xpos: 50
      ypos: 42
      length: 40
      styles:
        - stroke: var(--primary-text-color);
        - stroke-width: 5;
        - stroke-linecap: round;
        - opacity: 0.7;
  states:
    - id: 0
      entity_index: 0
      xpos: 50
      ypos: 34
      styles:
        - font-size: 3em;
    - id: 1
      entity_index: 1
      xpos: 40
      ypos: 57
      styles:
        - text-anchor: start;
        - font-size: 1.5em;
  icons:
    - id: 0
      entity_index: 1
      xpos: 37
      ypos: 57
      align: end
      size: 1.3
    - id: 1
      entity_index: 2
      xpos: 37
      ypos: 72
      align: end
      size: 1.3
  names:
    - id: 0
      entity_index: 0
      xpos: 50
      ypos: 95
horseshoe_scale:
  min: -10
  max: 40
color_stops:
  '16': '#FFF6E3'
  '17': '#FFE9B9'
  '18': '#FFDA8A'
  '19': '#FFCB5B'
  '20': '#FFBF37'
  '21': '#ffb414'
  '22': '#FFAD12'
  '23': '#FFA40E'
  '24': '#FF9C0B'
  '25': '#FF8C06'

… but nothing is displayed when I save. no card, no border, nothing. but it is there when I edit the dashboard

so do I need to do something else?

???

Hi ninjaef,

There are several large posts here that talk about Mushroom cards.
I suggest you move this to one of them.

for instance.

Searching before posting or heeding the hints on the side when you start a new post is usually a good idea.

(post deleted by author)