Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v78kPRA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1866febb-d723-4f4f-b00d-0749d1f3d061",
      "cw-b88d8281-5c9e-4126-94fe-d7f35de258e2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-830e9281-78d0-4dcd-851b-ebbb5835f689",
    "manifestId": "https://dam.iuav.it/iuav/containers/v78kPRA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b88d8281-5c9e-4126-94fe-d7f35de258e2"
  }
}