Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/23027/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f3805070-1c20-4438-bb90-5d654325a7d5",
      "cw-233badd9-f962-4f7d-ad8d-7bd69f65f7a7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2b21908e-0c9e-4026-82ba-7134dbb406a8",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/23027/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-233badd9-f962-4f7d-ad8d-7bd69f65f7a7"
  }
}