Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/27155/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5110d8c9-eac4-4332-910a-cba7dc269cce",
      "cw-08d3ab93-ce87-4848-a741-7fdadb8e9986"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-eaf07207-3fe7-44f5-b02d-46a6806ee6f3",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/27155/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-08d3ab93-ce87-4848-a741-7fdadb8e9986"
  }
}