Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21212",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6003e989-3574-4091-9da0-7bf717d6f1e0",
      "cw-40aea651-6ede-497e-821e-9d4a281b3bf7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9694e5ec-bd37-459a-8626-c72ea01005ca",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21212",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-40aea651-6ede-497e-821e-9d4a281b3bf7"
  }
}