Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21043",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0f1aa9aa-acc0-4606-b8e7-2fd3bf703801",
      "cw-99752238-b569-4c50-9fe1-c6b16ff1c338"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b416f14d-dbab-46a5-813d-7536b7357e01",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21043",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-99752238-b569-4c50-9fe1-c6b16ff1c338"
  }
}