The facet does not exist

Error: The requested address '/documents/facets?newFacet=evenement.marc%253DConf%25C3%25A9rence+intitul%25C3%25A9e+%2522La+d%25C3%25A9mocratie+%25C3%25A0+l%2527%25C3%25A9preuve+du+fake%2522.&clearFacets=1' was not found on this server.