Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AkEwg7Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-05beed02-3eb2-4e73-8fe4-797c4c24d421",
      "cw-e4302caf-fbc0-4af2-b86a-c2f3507cc647"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a3b0c405-36a4-45c9-92e1-c760428052ac",
    "manifestId": "https://dam.iuav.it/iuav/containers/AkEwg7Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e4302caf-fbc0-4af2-b86a-c2f3507cc647"
  }
}