Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/10306/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c510c75c-2e35-4ccc-ab99-c499c7089941",
      "cw-2e6aff09-d854-4c15-8e5e-80d6f1070a86"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7ee32f17-e7d6-4c48-9f28-09c93ef59730",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/10306/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2e6aff09-d854-4c15-8e5e-80d6f1070a86"
  }
}