Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZYz3Npv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-87941ecf-7666-410a-9056-5b8664b74672",
      "cw-581d3376-c5a0-435e-96cf-c6559ae54a36"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-29776e98-e621-43ae-b262-f7f2fcd05a03",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZYz3Npv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-581d3376-c5a0-435e-96cf-c6559ae54a36"
  }
}