Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://sandbox.zenodo.org/api/iiif/record:137062/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://sandbox.zenodo.org/api/iiif/record:137062/canvas/2%20%281%29.jpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b98f6c05-a157-415f-8083-31afaefcc953",
      "cw-99b38dbe-e4f9-43dc-98c0-383ed2f2fa92"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-ca919d4d-f451-4d19-9d8e-e8743462b82c",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:137062/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-99b38dbe-e4f9-43dc-98c0-383ed2f2fa92",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}