Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/pvlKaBZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a3ced780-cabf-489a-9db0-e6d0def40947",
      "cw-58f8499e-4e48-48b4-9158-17fc22f0c2b4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3616f7d6-e82b-4b86-b61a-1c5f3df83434",
    "manifestId": "https://dam.iuav.it/iuav/containers/pvlKaBZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-58f8499e-4e48-48b4-9158-17fc22f0c2b4"
  }
}