Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/14875/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3156a15f-2650-4b3b-bc4e-71a8dc727af1",
      "cw-04285128-af25-4bd1-9014-47f8dc69ce0f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a43ca629-6852-4e6b-8a37-f4de86d03a14",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/14875/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-04285128-af25-4bd1-9014-47f8dc69ce0f"
  }
}