Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/16256/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-19006d58-aab2-4bec-a903-1d574d0f8681",
      "cw-ce9f723f-609e-494c-bbeb-09fc97fbc014"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-289af36e-f2d5-4419-ac4d-e393100a1de5",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/16256/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ce9f723f-609e-494c-bbeb-09fc97fbc014"
  }
}