Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZjlDGlA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5899a90a-aa8f-4776-95c0-a27bc46022b5",
      "cw-b04a6971-f76d-4cff-8af2-2a3ea13b2fd6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-cccac7fd-07b5-4465-82cb-1070297c5dd2",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZjlDGlA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b04a6971-f76d-4cff-8af2-2a3ea13b2fd6"
  }
}