Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21502",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d153e7f4-2694-472f-a9b3-6761ed3a738d",
      "cw-cb4a347a-7034-4532-bcfd-bbc2185579df"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-15d7a2f8-db6a-4ba7-b7ee-a8f8a6474211",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21502",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-cb4a347a-7034-4532-bcfd-bbc2185579df"
  }
}