Reveived Invalid Slot Info ...

[open kestrel]

I have a custom sentence that used to work when Voice PE was brand new but for a long time now it has stopped working, instead the voice only says "Received invalid slot info for SetAlarmClock"

This is my code:

language: "de"
intents:
  SetAlarmClock:
    data:
      - sentences:
          - "[Stell den] Wecker[,] [für|auf] {hour}:{minute} Uhr"

lists:
  hour:
    range:
      from: 0
      to: 23
  minute:
    range:
      from: 0
      to: 59

I don't think it even gets to the execution but here is that code too:

# Custom Voice Actions
intent_script:
  # Alarm Clock
  SetAlarmClock:
    action:
      - action: input_datetime.set_datetime
        target:
          entity_id: input_datetime.bed_alarm_time
        data:
          time: "{{ hour }}:{{ minute }}:00"
      - action: input_boolean.turn_on
        target:
          entity_id: input_boolean.bed_alarm_toggle
    speech:
      text: "Wecker gestellt für {{ as_timestamp(today_at(states('input_datetime.bed_alarm_time'))) | timestamp_custom('%H:%M') }} Uhr"

Ohh ... apparently it does ...