Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkqGLv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b00a180e-d5fd-4671-af08-4438465333e1",
      "cw-72da0519-7b0d-49e8-87bf-71ba8dca4523"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-35253d9a-7226-4395-92d6-1cb082dec624",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkqGLv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-72da0519-7b0d-49e8-87bf-71ba8dca4523"
  }
}