Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/20200",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6fc317cf-f9b1-4ab5-8c17-edd7e65b84c5",
      "cw-c3235edf-80a8-4eaf-b41a-2a922ae52982"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-39ba893f-d350-4a9d-a09c-1e96dda814be",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/20200",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c3235edf-80a8-4eaf-b41a-2a922ae52982"
  }
}