Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/22789/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f13e51cc-f7ed-4cb5-8fd1-662d955237b2",
      "cw-9d0e4c73-fe17-4b92-ab63-0fb9d47e5bc6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-76284160-9cfd-4a5d-9b95-3de0fbc9e8ce",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/22789/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9d0e4c73-fe17-4b92-ab63-0fb9d47e5bc6"
  }
}