Mirador viewer

TypeError: Failed to fetch
{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://sandbox.zenodo.org/api/iiif/record:160296/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://sandbox.zenodo.org/api/iiif/record:160296/canvas/Bed-Bug-Mattress-Encasements-300x300.jpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-723032ea-ba73-4277-b593-9e0ba041d935",
      "cw-54a2c98d-34e4-40c1-adc0-b6b9bf9698c5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-ecee8eeb-586c-465e-997b-38997b4b6a7b",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:160296/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-54a2c98d-34e4-40c1-adc0-b6b9bf9698c5",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}
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