Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/pZ87QDe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bc8901a6-803f-476f-a86e-98fa525933f0",
      "cw-32d0199b-676a-43ee-867c-b38957aab9fd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e614c640-98bc-4562-94b0-bb64fc495122",
    "manifestId": "https://dam.iuav.it/iuav/containers/pZ87QDe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-32d0199b-676a-43ee-867c-b38957aab9fd"
  }
}