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/2147650812.jpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ca7f8dbf-c5c2-4b3c-98c4-0c1e0e4387d9",
      "cw-f02fabd3-6cea-4fdb-a21c-85246089cca3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-63ab2cca-538c-4c0f-9ad4-6386c550d5ab",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:137062/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f02fabd3-6cea-4fdb-a21c-85246089cca3",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}