Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZYz5dyv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-771b376f-35f2-4c58-961f-3456fa6c8957",
      "cw-7b0fb7f9-3f28-4acf-ba08-52a0d003f650"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-481d5b7a-58c2-4a65-8172-fa1bb398aac8",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZYz5dyv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7b0fb7f9-3f28-4acf-ba08-52a0d003f650"
  }
}