Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/3Zp8jMZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1723a27e-25b2-41c5-884c-5775d46fb33e",
      "cw-9a819419-5ec9-4e3f-b95a-c18532d4a699"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-76aafa68-9628-4855-8fde-499e6c2e8a95",
    "manifestId": "https://dam.iuav.it/iuav/containers/3Zp8jMZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9a819419-5ec9-4e3f-b95a-c18532d4a699"
  }
}