Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/21206",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-57c8b9c9-5c9d-4064-b3a9-f4dd96e23adc",
      "cw-14e7b5e2-b08a-48f3-9e6d-ab8478842f20"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-93cd9472-0b84-4646-ae9d-3feec918e852",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/21206",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-14e7b5e2-b08a-48f3-9e6d-ab8478842f20"
  }
}