Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/4020",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4d33ed57-ff40-4a80-940d-7f4d5c0d98b4",
      "cw-c1b5a2eb-53a0-45f1-8f2b-91a70f261f5c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e245982d-e6bf-46e0-8ab0-8d90ca6c4780",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/4020",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c1b5a2eb-53a0-45f1-8f2b-91a70f261f5c"
  }
}