Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/24916/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-996f9bf3-89ba-422d-ae40-83e1082e730a",
      "cw-997bdc22-b13d-4636-99f1-bd3fd21d2654"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a24f1edc-2725-47d9-951a-bce7d989bbad",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/24916/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-997bdc22-b13d-4636-99f1-bd3fd21d2654"
  }
}