Input_number hide/show

1

I’m trying to hide an input_number, rodi_timer when the switch is off and show it when switch’s state is on. I must admit I’m new to this.
Can someone point out to me what I’m doing wrong please?

- id: '147'
  alias: hide slider
  initial_state: false
  trigger:
    platform: template
    value_template: "{{ not is_state('switch.50207_3_socket_1', 'off') }}"
  action:
    service: group.set_visibility
    entity_id: group.rodi_timer
    data:
      visible: False
- id: '148'
  alias: unhide slider
  initial_state: false
  trigger:
    - platform: homeassistant
      event: start
    - platform: state
      entity_id: switch.50207_3_socket_1
      to: 'off'
  action:
    service: group.set_visibility
    entity_id: group.rodi_timer
    data:
      visible: True