Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v78loRA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7e3c7257-c43c-4058-9477-049a85f910fc",
      "cw-1c3c25c5-25ff-4030-a1d5-09ec09bb8f6c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0b4f66b9-656c-4b5e-a43c-e0202242e1f1",
    "manifestId": "https://dam.iuav.it/iuav/containers/v78loRA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1c3c25c5-25ff-4030-a1d5-09ec09bb8f6c"
  }
}