Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://zenodo.org/api/iiif/record:210721/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://zenodo.org/api/iiif/record:210721/canvas/figure.png",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e0e7275f-af85-4e1b-91ab-66b2d650fc31",
      "cw-d4cb70b6-c96b-4dfd-9985-db2d7e99a9b0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-580d11ec-3ac5-4938-bf7a-6077707940ac",
    "manifestId": "https://zenodo.org/api/iiif/record:210721/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d4cb70b6-c96b-4dfd-9985-db2d7e99a9b0",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}