Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/hcpl/iiif/4f6ef4ab-9161-42e3-bf3c-e764add81d4c/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6a6eddc3-ea1f-4a2b-9c63-bec1286de699",
      "cw-7a1647b2-709b-4a86-bc63-13a68b67750a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-abbb1c33-e62d-44da-80ac-9c2d69c6a1b1",
    "manifestId": "https://iiif.quartexcollections.com/hcpl/iiif/4f6ef4ab-9161-42e3-bf3c-e764add81d4c/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7a1647b2-709b-4a86-bc63-13a68b67750a",
    "thumbnailNavigationPosition": "far-bottom"
  }
}