Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21199",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ca22813a-27ad-4901-a61c-954e32d7143d",
      "cw-03ae0613-82bb-4498-9dcc-bb48f222e415"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a4b0c2af-1f3a-499f-9c16-4218b17f9439",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21199",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-03ae0613-82bb-4498-9dcc-bb48f222e415"
  }
}