Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/54321",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3befb2aa-7c56-46cb-a540-8bb5aa019a96",
      "cw-d7aa0433-c9e9-4371-9b5a-b2231054daaa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9917a950-c373-46c2-836c-1759f198215d",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/54321",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d7aa0433-c9e9-4371-9b5a-b2231054daaa"
  }
}