Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/51959",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b340c45e-17b2-4306-8e1e-db25234cc18d",
      "cw-6b33672e-98d1-4e8a-985c-8088aafbd14e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7726a6af-5b21-4c97-b985-da00c1da753e",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/51959",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6b33672e-98d1-4e8a-985c-8088aafbd14e"
  }
}