Mirador viewer

SyntaxError: Unexpected end of JSON input
{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/20819",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4d9340a2-1d1c-4f4e-997a-96b7df450800",
      "cw-2d484ecb-cffb-48aa-a3a5-f4adaa046ce6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-dca2de54-b7ba-4db5-98c4-372165a0fdfd",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/20819",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2d484ecb-cffb-48aa-a3a5-f4adaa046ce6"
  }
}
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