Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21809",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-623f7641-392f-4235-98e2-1532857b6a45",
      "cw-6519ac7b-d19d-49e0-a86f-925a85ca84d2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a20385ac-24f7-4674-aa7d-f463d6c35a77",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21809",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6519ac7b-d19d-49e0-a86f-925a85ca84d2"
  }
}