Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/22578/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-afa4bff1-4e23-49b2-98ff-ae3bd34e7250",
      "cw-d7ce768b-b31b-4caf-965a-40becf797e81"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8618f08c-0a31-41be-8371-ad192f565e66",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/22578/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d7ce768b-b31b-4caf-965a-40becf797e81"
  }
}