The facet does not exist

Error: The requested address '/documents/facets?amp%253BclearFacets=1&amp%253BnewFacet=creatorFacet%253DPerret%252C+Michel&newFacet=subjectFacet%253DAlan+Williams%252C+Takuzo+Aida%252C+Andrew+B.+Holmes%252C+Roderick+MacKinnon%252C+Venkatraman+Ramakrishnan%252C+David+Leigh.' was not found on this server.