Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/20611/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-73e1a02b-db9e-44e2-8d77-d0ab92e0dc93",
      "cw-2d854a99-4409-4f5a-b174-955c52890017"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b0282bed-4cb6-4759-86d0-f1ebd0ddbb2e",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/20611/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2d854a99-4409-4f5a-b174-955c52890017"
  }
}