Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/24701/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2f1dfedf-ceb2-4500-9c90-b69bc8a03de4",
      "cw-a8e7a3f1-2b2d-4332-86d9-55cda40328f8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5fadd4f1-0823-4756-a918-d2b0ae2c6728",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/24701/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a8e7a3f1-2b2d-4332-86d9-55cda40328f8"
  }
}