Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/11893/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c66b327c-5296-4c7e-b2fb-e1dcd9bcada1",
      "cw-af06e1c4-916c-4d2d-bc3d-30a8b3fe91f4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6036d6b8-da82-48ed-be5c-d38d7a8f9143",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/11893/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-af06e1c4-916c-4d2d-bc3d-30a8b3fe91f4"
  }
}