Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/15769/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6765ec1b-2683-4a10-8647-30ccff7bac52",
      "cw-24b03565-ee09-4632-8424-3efce14271f7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-85eab9d6-abc3-437f-ac43-72b259889b1f",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/15769/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-24b03565-ee09-4632-8424-3efce14271f7"
  }
}