Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/7562/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-49f0fd93-174b-47ab-825a-e7a66eb35cd3",
      "cw-d6b53589-4268-4752-995e-bb52c2c4f81b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0d8565f8-ba9e-4553-a1e2-77b69a4e91d9",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/7562/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d6b53589-4268-4752-995e-bb52c2c4f81b"
  }
}