Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iccu.sbn.it/edit16_default/containers/penW2pa/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a77fb2d5-829c-4832-b7e1-338eef3a1597",
      "cw-9c91a0c2-4a93-4b6c-9c5c-efe85c606a23"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "main-window",
    "manifestId": "https://dam.iccu.sbn.it/edit16_default/containers/penW2pa/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9c91a0c2-4a93-4b6c-9c5c-efe85c606a23"
  }
}