Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/imb/iiif/fbf98fc9-b669-4263-b6a3-567e5befe4f3/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3dc12468-baed-4e9e-9677-cf14dad50c3b",
      "cw-7a40f925-ec18-4fc5-8402-a8b2e7f92666"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-966dea10-afba-4765-8fef-37c39c072a53",
    "manifestId": "https://iiif.quartexcollections.com/imb/iiif/fbf98fc9-b669-4263-b6a3-567e5befe4f3/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7a40f925-ec18-4fc5-8402-a8b2e7f92666",
    "thumbnailNavigationPosition": "far-bottom"
  }
}