Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/52021",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5543c995-39cd-46d9-8493-169c5f346db4",
      "cw-1c82be75-684d-493f-802d-727fb7a14352"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f4f36924-dae0-404a-ad9d-6546ec3d811d",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/52021",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1c82be75-684d-493f-802d-727fb7a14352"
  }
}