Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/21025/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c9f7a42f-505e-45ba-8770-f85b3febb28a",
      "cw-5596d580-0133-4bc0-9b62-dae11ca35a15"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1e951713-d444-4f42-9f5c-26cbe305b987",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/21025/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5596d580-0133-4bc0-9b62-dae11ca35a15"
  }
}