Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://zenodo.org/api/iiif/record:971552/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://zenodo.org/api/iiif/record:971552/canvas/big_56914.jpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-981d100e-313f-4eee-a96c-e3a352f9a5b8",
      "cw-ae616b86-a73d-4017-827c-7fc65ae37dba"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-dd81bc68-1c05-4e7a-b99b-b7edd07c3551",
    "manifestId": "https://zenodo.org/api/iiif/record:971552/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ae616b86-a73d-4017-827c-7fc65ae37dba",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}