Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/imb/iiif/ad81a54a-9ab3-4a8d-b324-aad80c0eba0b/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9533329d-55d6-4ec7-8cb4-898a41eb52e7",
      "cw-e30b5452-9501-484c-84f8-ab0d4fb14d91"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c0a37f9f-b5db-4086-872e-68114fa98222",
    "manifestId": "https://iiif.quartexcollections.com/imb/iiif/ad81a54a-9ab3-4a8d-b324-aad80c0eba0b/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e30b5452-9501-484c-84f8-ab0d4fb14d91",
    "thumbnailNavigationPosition": "far-bottom"
  }
}