Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/imb/iiif/878b68f9-a977-41d7-9579-f9d5dca55785/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bf380856-c6e3-49ca-bcf2-46e1d3a558ab",
      "cw-ea88a1a3-631f-4099-bcfb-207fd52b67f8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9bb3fce9-278f-4168-af62-ce7edb36791a",
    "manifestId": "https://iiif.quartexcollections.com/imb/iiif/878b68f9-a977-41d7-9579-f9d5dca55785/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ea88a1a3-631f-4099-bcfb-207fd52b67f8",
    "thumbnailNavigationPosition": "far-bottom"
  }
}