Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/14947/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-98b15fc7-32ee-44bb-866b-4171a9df4aa3",
      "cw-bb9d326f-6610-4054-a842-51c3f5c4ddf3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f36cc424-5fbd-483a-ad3d-275652af5dcc",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/14947/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bb9d326f-6610-4054-a842-51c3f5c4ddf3"
  }
}