The facet does not exist

Error: The requested address '/documents/facets?newFacet=evenement.marc%3DStands+de+la+Facult%C3%A9+des+sciences+lors+de+la+Journ%C3%A9e+d%E2%80%99information+sur+les+fili%C3%A8res+le+28+f%C3%A9vrier+20&clearFacets=1' was not found on this server.