Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/20929",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f095b375-392b-4e1d-aeae-021a19ff73ad",
      "cw-f56cfe79-87a6-4423-a153-ef8c62f87128"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0b529ff8-0497-4125-8d54-9b9eac382c2b",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/20929",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f56cfe79-87a6-4423-a153-ef8c62f87128"
  }
}