Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/28420",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7eb9d529-a0f0-4d1f-b389-85947bd221f6",
      "cw-1f1fb350-57a9-4b78-90b2-ad3e2831c4a2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4709bf99-1ec7-4861-9c0d-24ebcd2cffb6",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/28420",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1f1fb350-57a9-4b78-90b2-ad3e2831c4a2"
  }
}