Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21409",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-670889a5-fd2b-4d0c-b364-9320aea88dae",
      "cw-39fb72e7-5c35-437c-9a70-6a29aa8fc924"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-88772f2d-9bb7-4f7e-bd43-986189d090a5",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21409",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-39fb72e7-5c35-437c-9a70-6a29aa8fc924"
  }
}