Make sure the target computer on which you are installing the replication components meets the minimum memory and disk space requirements.
See the Replication Server Installation Guide > Planning Your Installation > System Requirements and the Replication Agent Installation Guide > Planning Your Installation > System Requirements.
To improve performance by avoiding multiple network hops, install Replication Server and the SAP HANA database on the same machine. Replication Agent must have direct access to the Oracle online and redo logs and must be installed on the same machine as the primary database.