Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/22519/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-40064ef9-dacd-405c-b649-bff4dbe262a3",
      "cw-be1e858e-ee6f-440c-a5ae-45ea36ee1963"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a90718d6-35f5-475f-a52d-d2183f938ece",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/22519/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-be1e858e-ee6f-440c-a5ae-45ea36ee1963"
  }
}