Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21741",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-90bc893f-2bd4-4d75-9f76-2fd4827cb5b1",
      "cw-9ad864b0-5e26-42c2-a89c-d7de6e238859"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3be9d9c8-ab21-4626-8a92-16d3ff462f82",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21741",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9ad864b0-5e26-42c2-a89c-d7de6e238859"
  }
}