Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/2436/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2047b9cd-bb75-4f51-a49f-e52fe6d3f8cb",
      "cw-23d6c7bb-b200-45cb-8074-056ddf5bfa9e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e76550db-de20-47a6-88e2-a58d59848092",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/2436/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-23d6c7bb-b200-45cb-8074-056ddf5bfa9e"
  }
}