Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/20366/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-02ae98fa-cc63-4c76-8d7d-e7addc9db85d",
      "cw-8385bc20-700a-46be-8b94-664e38d0d9cc"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ef176ffd-79f9-47bb-b1db-10906db5a8cc",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/20366/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8385bc20-700a-46be-8b94-664e38d0d9cc"
  }
}