Configure the (+) Add button in k-structure-field

I just playing arround with the Kirby UI Kit and stumbled upon the k-structure-field.

Given

<k-structure-field
    v-model="value"
    :required="true"
    label="Structure"
    name="structure"
    help="This is a structure field"
    @input="input"
/>

Result

How the heck do I configure the (+) Add Button to open a dialog? if I click the Button I get can't convert undefined to object error.

Also if I add :fields like and click an the empty state

 <k-structure-field
      v-model="value"
      :required="true"
      :fields="{
        name: {
            label: 'Name',
            type: 'text'
        }
      }"
      label="Structure"
      name="structure"
      help="This is a structure field"
      @input="input"
    />

I get an t.endpoints is undefined error.

As a side note this view is renderd in a custom panel plugin.

Same for me, I’m totally stuck to use it…
The documentation seems to be incomplete for this field even if another has kind of “action” events behavior…
https://getkirby.com/docs/reference/plugins/ui/list-item#events

<template>
  <k-list-item
    :options="[
      {icon: 'edit', text: 'Edit', click: 'edit'},
      {icon: 'trash', text: 'Delete', click: 'delete'}
    ]"
    @action="action"
  />
</template>

<script>
export default {
  methods: {
    action(type) {
      switch(type) {
        case 'edit':
          // edit the item here
          break;
        case 'delete':
          // delete the item here
          break;
      }
    }
  }
};
</script>