Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/imb/iiif/305cf982-2029-4bb0-87ab-6ca4fda460cd/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c7add7b3-287e-4842-a7fe-28f984c3d85e",
      "cw-85d60865-0349-4bce-abbc-b5dfd158cef5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-37948cdf-efbc-406c-86aa-b75f6c4f719c",
    "manifestId": "https://iiif.quartexcollections.com/imb/iiif/305cf982-2029-4bb0-87ab-6ca4fda460cd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-85d60865-0349-4bce-abbc-b5dfd158cef5",
    "thumbnailNavigationPosition": "far-bottom"
  }
}