Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/22136/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-aaf5d863-76f4-4cb6-ae2c-89746b45e304",
      "cw-72c3ecf5-44cf-4c01-876d-dcc7ca35a6df"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-06205ffa-b250-4a49-b9d3-48fc91c3bbf8",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/22136/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-72c3ecf5-44cf-4c01-876d-dcc7ca35a6df"
  }
}