Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/16442/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-fabde55a-8bd6-4def-bdec-61c4950bb275",
      "cw-9bf005b5-e7d4-48b4-b7ce-015a8273939b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8a9f5544-c778-4087-a44b-fa75d67094a0",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/16442/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9bf005b5-e7d4-48b4-b7ce-015a8273939b"
  }
}