Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v687GKe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-adec1c90-54fb-46a2-8f89-1cb5f150e83f",
      "cw-06dbe100-a51b-4b88-a571-32bdfa85e154"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b9408a69-019f-42d6-9153-edd30b61fa2d",
    "manifestId": "https://dam.iuav.it/iuav/containers/v687GKe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-06dbe100-a51b-4b88-a571-32bdfa85e154"
  }
}