Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZpwOGPe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-23bd21f8-1aea-4581-b62a-af89773a1f0c",
      "cw-f6d5475a-1b6a-4369-81f4-4800a4a2dd92"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-928beca4-00b4-4f83-8cb0-8dd7e90cf932",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZpwOGPe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f6d5475a-1b6a-4369-81f4-4800a4a2dd92"
  }
}