Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/20861",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-251f6c55-6969-4460-864e-0c3999a02ca8",
      "cw-c6b3dcbd-848c-49fa-8cc7-88e5af60fc4f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3f5936ce-f10a-4532-8ec0-29c0e15b3a23",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/20861",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c6b3dcbd-848c-49fa-8cc7-88e5af60fc4f"
  }
}