The facet does not exist

Error: The requested address '/documents/facets?amp%253BclearFacets=1&amp%253BnewFacet=creatorFacet%253DPerret%252C+Michel&newFacet=evenementmarcFacet%253DA+v%25C3%25A9lo+%25C3%25A0+l%2527Uni' was not found on this server.