Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/56777",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-33bfc69b-dfe3-4f2b-8da3-cd0d792d1df6",
      "cw-1f08a313-c7ff-4ccd-ab87-dd24cbc18f7c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f56e69e3-1c25-4231-95a2-985b48b08591",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/56777",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1f08a313-c7ff-4ccd-ab87-dd24cbc18f7c"
  }
}