Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v49g8jA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3cb89afc-0d3a-498b-9481-f9137a0eb1a8",
      "cw-0902db87-d13b-4516-8311-1ae58b86a93a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a30d74fe-b832-48b7-86e7-c3207b869926",
    "manifestId": "https://dam.iuav.it/iuav/containers/v49g8jA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0902db87-d13b-4516-8311-1ae58b86a93a"
  }
}