Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://sandbox.zenodo.org/api/iiif/record:182252/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://sandbox.zenodo.org/api/iiif/record:182252/canvas/4692T500-4-02-7-letters-CL.tif",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-26025351-2231-43ed-b45e-eb454947e807",
      "cw-80a51aa5-0c35-4b3f-9559-5ab16ac71b5c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-8fc013f4-e438-40d6-864e-6f8b10c56e8e",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:182252/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-80a51aa5-0c35-4b3f-9559-5ab16ac71b5c",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}