Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbWqQv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d22a2dce-eec1-45e0-9f7a-6e1b8939efbf",
      "cw-0f55e5e2-4e0a-44bd-b7df-f021589c4fdd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4c25bf68-60f8-4921-b2eb-60398ab78499",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbWqQv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0f55e5e2-4e0a-44bd-b7df-f021589c4fdd"
  }
}