Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/6578/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-12603856-b604-4807-a372-51d579ab655d",
      "cw-bff122fb-b0f5-4208-a958-f306d36ff830"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d3a07740-792c-4d40-bec7-97e306abc743",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/6578/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bff122fb-b0f5-4208-a958-f306d36ff830"
  }
}