Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AVW99De/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f59a7833-099f-4879-b15a-d4c6b1cbe4b3",
      "cw-ccc48ec7-c1c7-4733-86e3-d4589db6391d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9f0444a5-cc31-4b2e-a984-7f33bff25aff",
    "manifestId": "https://dam.iuav.it/iuav/containers/AVW99De/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ccc48ec7-c1c7-4733-86e3-d4589db6391d"
  }
}