Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/eg878wZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4d39ac7e-c76a-4909-b87c-25b87782a638",
      "cw-276e4889-7b50-4257-95b2-62ea797b4e56"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2db77919-883c-4a18-844b-2cd567b26053",
    "manifestId": "https://dam.iuav.it/iuav/containers/eg878wZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-276e4889-7b50-4257-95b2-62ea797b4e56"
  }
}