Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/14947/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-fea30874-aba9-4906-b1f9-5c58ae8a74f5",
      "cw-fa1d6472-7c26-4835-8831-923286cb5bb0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-17a0189e-2756-498e-bbeb-d8afcd060689",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/14947/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-fa1d6472-7c26-4835-8831-923286cb5bb0"
  }
}