Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/20640",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-255c7e92-7abf-498b-9169-feae2e53ef9f",
      "cw-f80eed01-95ad-4c1c-b56a-df828f2e1bde"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8f67e9dc-dbc7-4daa-b6e3-c2353b0b508e",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/20640",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f80eed01-95ad-4c1c-b56a-df828f2e1bde"
  }
}