Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/81421",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3af0c5a7-66c3-4e64-a8cc-93c7b86c053b",
      "cw-2917db62-53f7-49d5-bed7-ef36831f9b7d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-72176ef4-5db4-4407-af02-9c652be97aa0",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/81421",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2917db62-53f7-49d5-bed7-ef36831f9b7d"
  }
}