Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://zenodo.org/api/iiif/record:973935/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://zenodo.org/api/iiif/record:973935/canvas/big_96501.jpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-716a1342-9bb4-430e-9b76-5d984117c4a9",
      "cw-4445f8d2-108f-47dc-ab20-247d024b5880"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-8675fcb4-38db-4c6c-bc0c-ebd3e033bc49",
    "manifestId": "https://zenodo.org/api/iiif/record:973935/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4445f8d2-108f-47dc-ab20-247d024b5880",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}