Mirador viewer

SyntaxError: Unexpected end of JSON input

{
  "manifest": {
    "error": "SyntaxError: Unexpected end of JSON input",
    "id": "https://manifests.collections.yale.edu/ycba/obj/52969",
    "isFetching": false
  },
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    "companionAreaOpen": true,
    "companionWindowIds": [
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    "id": "window-4b747d40-d6bb-4c63-a4c5-37a3d965dbd8",
    "manifestId": "https://manifests.collections.yale.edu/ycba/obj/52969",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-71cceb7b-095b-4322-bc79-e7ac5f74db89"
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}