Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/7Az6xkA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6fa0768d-86d5-451a-bf59-836a6fc8bb36",
      "cw-855654d2-c7c9-404c-b58d-7e3eb402741a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9b02d032-3ac8-419c-b8be-189a69a607e8",
    "manifestId": "https://dam.iuav.it/iuav/containers/7Az6xkA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-855654d2-c7c9-404c-b58d-7e3eb402741a"
  }
}