Updated Drupal to 8.6. This goes with the following updates because it's possible...

[yaffs-website] / web / core / profiles / demo_umami / config / install / image.style.large_3_2_768x512.yml

langcode: en
status: true
dependencies: {  }
name: large_3_2_768x512
label: 'Large 3:2 (768x512)'
effects:
  36c9f14a-8f5e-4794-92ea-bffab074f52e:
    uuid: 36c9f14a-8f5e-4794-92ea-bffab074f52e
    id: image_scale_and_crop
    weight: 1
    data:
      anchor: center-center
      width: 768
      height: 512