The facet does not exist

Error: The requested address '/documents/facets?amp%253BclearFacets=1&amp%253BnewFacet=creatorFacet%253DPerret%252C+Michel&newFacet=subjectFacet%253Dphysique+de+la+mati%25C3%25A8re+condens%25C3%25A9e' was not found on this server.