Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v687zje/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6798b309-cb73-4334-bd09-21f37c5631ed",
      "cw-b567de3f-6509-4bb1-9705-21b445b43b62"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ca1db1b0-5eb2-40c6-bde2-1596de666ae0",
    "manifestId": "https://dam.iuav.it/iuav/containers/v687zje/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b567de3f-6509-4bb1-9705-21b445b43b62"
  }
}