Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21972",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bc5f1121-ce76-4bc1-baee-f91ea9b7a074",
      "cw-6fbd07af-d314-4056-ab54-3a6429fd484e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fc249053-9bf4-477a-91a9-7788e5bea0e9",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21972",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6fbd07af-d314-4056-ab54-3a6429fd484e"
  }
}