Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/7562/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-68b5da85-179b-4232-a062-32f23218c94a",
      "cw-bf1d8c3c-2386-4d7e-9386-bf9f66052b80"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4ddb6f98-788f-42ab-8d1f-e04cd678c300",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/7562/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bf1d8c3c-2386-4d7e-9386-bf9f66052b80"
  }
}