Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/27602/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-51927aa8-5492-4c8a-be34-e3c55a8291cd",
      "cw-8b9c1cd0-8659-41c7-b568-a8cd10b70623"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a213f9c8-4e4a-415b-85bf-f0355568d805",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/27602/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8b9c1cd0-8659-41c7-b568-a8cd10b70623"
  }
}