Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/22477/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4ab80874-1fbf-4ac9-9cd1-030a4bfffb67",
      "cw-bec33b2e-debb-4718-876b-3b35b98fd6a0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-94d42bee-63f9-4dff-9467-b11fb116c2cd",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/22477/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bec33b2e-debb-4718-876b-3b35b98fd6a0"
  }
}