Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/28773",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bec08b64-73ad-4451-85fb-6ffa6958e099",
      "cw-4fb87d91-4ae9-45c8-8124-9a4926e65701"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4111907c-8c27-4164-a3c7-9003c79262e2",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/28773",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4fb87d91-4ae9-45c8-8124-9a4926e65701"
  }
}