Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/27689/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e002d860-3a96-4297-85a6-c5d54dd8800e",
      "cw-697a17ec-9a53-4b65-9fc9-0c12fb185ed0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6770a800-42b5-4297-a4cd-627f9c756a49",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/27689/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-697a17ec-9a53-4b65-9fc9-0c12fb185ed0"
  }
}