TypeError: Failed to fetch

{
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    "error": "TypeError: Failed to fetch",
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    "isFetching": false
  },
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    "rangeId": null,
    "rotation": null,
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    "thumbnailNavigationId": "cw-2e4a42e1-2ba4-461f-82d9-bcfe87c2b16d",
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    "loadedManifest": "http://album.atlantahistorycenter.com/iiif/2/Allenfam:14/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
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}