Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/30023/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7d65ac35-ad02-4d6d-bb68-c25b57d6f528",
      "cw-64e2e1cb-edb3-447a-83ff-2a310bb7e1ea"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b613590e-e51a-48a9-9247-cab942f53df0",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/30023/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-64e2e1cb-edb3-447a-83ff-2a310bb7e1ea"
  }
}