Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/20862",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8f4b498e-4f2c-4a5a-bb54-f143b6a61d67",
      "cw-2a683bd1-a5d3-44bd-9716-56f60f862784"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8d3e04cd-6fd9-4b1c-88fd-1caf9a40d7bd",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/20862",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2a683bd1-a5d3-44bd-9716-56f60f862784"
  }
}