Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/16442/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d39edbda-aea8-449b-aa11-7436f68f3648",
      "cw-84faa22c-ccc6-4816-bf75-8933bc62bed2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4b1839c8-e814-4dfb-b983-5c414500b55c",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/16442/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-84faa22c-ccc6-4816-bf75-8933bc62bed2"
  }
}