Hej, I am creating slideshow module in sanity, but I get this error: ```An error occured: Invalid item type: "[object Object]". Default array input can only contain objects...

An error occured: Invalid item type: "[object Object]". Default array input can only contain objects (for now)
Check your browser's JavaScript console for details.

export default {
  title: 'Slideshow Module',
  name: 'slideshowModule',
  type: 'array',
  hidden: true,
  of: [
    {
      type: 'object',
      fields: [
        {
          name: 'headline',
          title: 'Headline',
          type: 'localeString'
        },
        {
          name: 'subtitle',
          title: 'Subtitle',
          type: 'localeString'
        },
        {
          name: 'images',
          title: 'Images',
          type: 'imageModule'
        }
      ]
    }
  ]
}