TypeError: Failed to fetch

{
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    "error": "TypeError: Failed to fetch",
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    "sideBarPanel": "info",
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    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "https://curate.library.emory.edu/iiif/648ffbg8w3-cor/manifest?manifest=https://curate.library.emory.edu/iiif/648ffbg8w3-cor/manifest",
    "allowFullscreen": true,
    "allowMaximize": false
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}