Mirador viewer

TypeError: Failed to fetch

{
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    "error": "TypeError: Failed to fetch",
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    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://zenodo.org/api/iiif/record:3778119/canvas/figEthn3.png",
    "collectionIndex": 0,
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    "manifestId": "https://zenodo.org/api/iiif/record:3778119/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
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    "thumbnailNavigationPosition": "far-right",
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