Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/54961",
    "isFetching": false
  },
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    "id": "window-5c9064b1-9e75-4e04-9dab-6679477e865b",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/54961",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
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    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9601a372-8aa2-4762-a3b0-6b326715b70e"
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}