Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21973",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f86aaced-2c87-4663-9eb7-4b47772cd083",
      "cw-3f9d258e-46f4-4837-aecf-5dad00a053dc"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-64065430-8301-4a57-bd30-bc955cd9e4d7",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21973",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3f9d258e-46f4-4837-aecf-5dad00a053dc"
  }
}