Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkMmyv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c59428dd-e58d-454a-a69c-0fcd8685d2f9",
      "cw-ea18e67f-11ea-4a51-9b9c-53afcd76f6af"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e551ad18-ae92-4188-a64e-a80834216c2d",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkMmyv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ea18e67f-11ea-4a51-9b9c-53afcd76f6af"
  }
}