Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/imb/iiif/8cfb876c-d87f-4ec5-95b3-c44dfa3d87f0/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0ef61a1f-82da-4f94-85c4-d17fd6de3e5d",
      "cw-b0ba9fcb-9f8c-4313-babc-50ac9ef5254a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-38909a76-4c7e-4db3-9750-e6ea553a58a0",
    "manifestId": "https://iiif.quartexcollections.com/imb/iiif/8cfb876c-d87f-4ec5-95b3-c44dfa3d87f0/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b0ba9fcb-9f8c-4313-babc-50ac9ef5254a",
    "thumbnailNavigationPosition": "far-bottom"
  }
}