Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/qstarter29/iiif/6e89c57d-2812-4389-bca8-9f38f0d5703c/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c7216149-9cf7-486d-a5f2-75675408466f",
      "cw-6526f69b-677f-4b25-b7ff-eb6065383aa1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c7260e10-3d14-4d76-94b6-ba0cefe17989",
    "manifestId": "https://iiif.quartexcollections.com/qstarter29/iiif/6e89c57d-2812-4389-bca8-9f38f0d5703c/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6526f69b-677f-4b25-b7ff-eb6065383aa1",
    "thumbnailNavigationPosition": "far-bottom"
  }
}