Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/qstarter29/iiif/d8def6e7-95a6-4f4e-a92e-d84451ada3fa/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-80fc6ef3-d377-4c25-b24b-81e1db07bd48",
      "cw-456123bb-7d23-4e85-9d9a-8d69dacd762c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-775fb3ea-d902-46fa-a294-1355bdc5dc4a",
    "manifestId": "https://iiif.quartexcollections.com/qstarter29/iiif/d8def6e7-95a6-4f4e-a92e-d84451ada3fa/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-456123bb-7d23-4e85-9d9a-8d69dacd762c",
    "thumbnailNavigationPosition": "far-bottom"
  }
}