Access restriction error on Groovy for MultipartEntityBuilder


While trying to "import org.apache.http.entity.mime.MultipartEntityBuilder" in a Groovy script, I get the error "access restriction: the type multipartentitybuilder is not api (...) restriction on required library", but as far as I know, that's a public library. It happened in Bonita Studio 7.11.0 and 7.11.1.

Does anyone know how to fix this?

No answers yet.