It's recommended to install DDL trigger when connected as SYSDBA user. Trigger is created in utPLSQL schema. If using the owner schema of utPLSQL to install trigger, the owner needs to have ADMINISTER ...
docker run -d -p 8080:8080 -p 1521:1521 -e INSTALL_UTPLSQL=true aledv/docker-oracle-12c-utplsql Run and Install utPLSQL framework [http://utplsql.org/] and Create ...