Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/qstarter29/iiif/b7b87979-abfc-4021-bb23-9c95f4903716/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4956877b-789b-4957-93ce-7071723718e3",
      "cw-bb5602db-282e-43a7-8d2b-e8ca4db25f54"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4322ce2c-05b3-4217-8201-120b54d14ec4",
    "manifestId": "https://iiif.quartexcollections.com/qstarter29/iiif/b7b87979-abfc-4021-bb23-9c95f4903716/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bb5602db-282e-43a7-8d2b-e8ca4db25f54",
    "thumbnailNavigationPosition": "far-bottom"
  }
}