Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZbQ0RGe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-da6370ad-f952-461c-a406-fc2eab942b2d",
      "cw-9e73cfdc-36ef-47e0-b3fd-cd8c866574d3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1a4b83be-d5c9-4ade-a532-c0f58c36e7f6",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZbQ0RGe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9e73cfdc-36ef-47e0-b3fd-cd8c866574d3"
  }
}