Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/4120",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-49f343e8-30e3-43ff-9115-1140871b66ff",
      "cw-442c5275-b44f-4eb3-86bd-846645759026"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-122256f7-634c-4f7a-9fe2-c30d3ed9249b",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/4120",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-442c5275-b44f-4eb3-86bd-846645759026"
  }
}