Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://zenodo.org/api/iiif/record:978935/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://zenodo.org/api/iiif/record:978935/canvas/big_83007.jpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e6c2b1be-d596-492f-88c6-d8a40c780925",
      "cw-fe6380eb-d1e5-42a7-a2bf-f5bbe22c14c0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-3c50ef28-4b1d-4261-8908-c22d04c2e86f",
    "manifestId": "https://zenodo.org/api/iiif/record:978935/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-fe6380eb-d1e5-42a7-a2bf-f5bbe22c14c0",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}