Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/28860",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-cc47aea6-eae1-4600-b5ee-1660334fb8cb",
      "cw-56bd24c2-03c3-4c67-a238-77b95232bab9"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a401d7f2-aac8-4045-9f20-566f65dfdaed",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/28860",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-56bd24c2-03c3-4c67-a238-77b95232bab9"
  }
}