Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/16172/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f7b2eb23-b7d6-4ea7-b9c4-4c433be479c0",
      "cw-98f6713f-8c26-4849-9709-c838028585f5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0b9e19fd-bb68-4c8d-8ba2-1baef1b27e8b",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/16172/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-98f6713f-8c26-4849-9709-c838028585f5"
  }
}