Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/desplaines/iiif/dff93a60-f30f-4180-9bca-bd539eb8d08d/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-904429ca-ff83-497a-99d3-94edf51831fe",
      "cw-81f882b8-7494-406d-83ee-234ab0664f72"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ebf357b0-0e7e-4065-b575-b2345f621052",
    "manifestId": "https://iiif.quartexcollections.com/desplaines/iiif/dff93a60-f30f-4180-9bca-bd539eb8d08d/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-81f882b8-7494-406d-83ee-234ab0664f72",
    "thumbnailNavigationPosition": "far-bottom"
  }
}