Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://sandbox.zenodo.org/api/iiif/record:177032/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://sandbox.zenodo.org/api/iiif/record:177032/canvas/cnc1.jpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1e6d8a6c-dfc0-4172-a1a2-01f087410906",
      "cw-354c8cf5-01b5-431f-8bd4-213509b06b7d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-f9bba12a-5e96-4e88-9f4f-59a62ce7b14c",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:177032/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-354c8cf5-01b5-431f-8bd4-213509b06b7d",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}