Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Rvo8mkA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-38f41236-66c9-4909-ab0d-d5233617d2e3",
      "cw-d1add72e-d5db-44a9-80ab-e86b20000e67"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-af3870d3-aa0e-4657-8e17-2d91d818205e",
    "manifestId": "https://dam.iuav.it/iuav/containers/Rvo8mkA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d1add72e-d5db-44a9-80ab-e86b20000e67"
  }
}