Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/imb/iiif/a305c169-0af5-4ad0-9a62-9f84fc57a36f/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-db935eb6-8873-4b51-8fb0-358d3a5a92c3",
      "cw-97b0f267-d8fd-4c2c-bd1b-7a9d4e3e2e42"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4ad44067-995e-46ff-80a4-358a0ee2941e",
    "manifestId": "https://iiif.quartexcollections.com/imb/iiif/a305c169-0af5-4ad0-9a62-9f84fc57a36f/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-97b0f267-d8fd-4c2c-bd1b-7a9d4e3e2e42",
    "thumbnailNavigationPosition": "far-bottom"
  }
}