Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/12048/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4ad8c591-dc4c-4ae7-aa52-dfeb107df9b1",
      "cw-1438d0b7-0e05-4694-b181-c0b498d0f162"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a54d8b70-2cd3-4532-8352-45030517e9c8",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/12048/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1438d0b7-0e05-4694-b181-c0b498d0f162"
  }
}