Bonjour,
faut enlever le trait - devant type, pour la première carte.
type: vertical-stack
cards:
- type: horizontal-stack
cards:
- type: custom:mushroom-person-card
entity: person.x1
- type: custom:mushroom-person-card
entity: person.x2
- type: horizontal-stack
cards:
- type: custom:mushroom-person-card
entity: person.x3
- type: custom:mushroom-person-card
entity: person.x4
- type: horizontal-stack
cards:
- type: custom:mushroom-person-card
entity: person.x5
- type: custom:mushroom-person-card
entity: person.x6