Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/14764/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c17d37ff-0084-453a-b122-9a8378fef20a",
      "cw-046cafbc-cd79-47e7-99ba-5ff209eeb887"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-74886b88-94ac-44fd-be60-74f2f7acfe99",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/14764/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-046cafbc-cd79-47e7-99ba-5ff209eeb887"
  }
}