Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/52959",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-154c5b6c-78c1-4f18-a518-98240753bbfd",
      "cw-6ce60141-c937-495d-83e6-5d34dbae2ded"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4b9710e1-9bb8-4eb5-bbe3-82b26dc01872",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/52959",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6ce60141-c937-495d-83e6-5d34dbae2ded"
  }
}