Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vaX8lpZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6d4004de-b357-4515-bec4-59275bcd831d",
      "cw-97af4b22-f8f2-47f2-9faf-f3f69fd02647"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b483df4c-c4df-4f53-b8f4-2d74cd007932",
    "manifestId": "https://dam.iuav.it/iuav/containers/vaX8lpZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-97af4b22-f8f2-47f2-9faf-f3f69fd02647"
  }
}