Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/31378",
    "isFetching": false
  },
  "window": {
    "canvasId": null,
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3e0b645c-2fd5-4134-8814-b7af603a2115",
      "cw-426bd7cb-f1a3-4ad3-9d2c-20005d00e788"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b9fbe939-05f6-476a-a419-cc1af5669081",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/31378",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-426bd7cb-f1a3-4ad3-9d2c-20005d00e788"
  }
}