Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/e50993A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-298068f9-303b-4b40-8721-1bca0ead386e",
      "cw-1100f877-9b60-4813-917f-7f0cf47eb0b4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-08e631df-888b-4709-bec2-567869a97df1",
    "manifestId": "https://dam.iuav.it/iuav/containers/e50993A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1100f877-9b60-4813-917f-7f0cf47eb0b4"
  }
}