Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/20878",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1f1b55ae-b5ef-4544-84a0-4e1e8480ecdb",
      "cw-7b0bad43-6f95-4e94-a6ce-e8f24e55a94d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-35f8da8b-6c3b-47d7-95ce-ac9afe5c40c9",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/20878",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7b0bad43-6f95-4e94-a6ce-e8f24e55a94d"
  }
}