HOST_COLLECTION_ORACLE_CONN_STR
This parameter is shipped in the Portal software and is listed in the Add Advanced Parameter window.
Valid Values: jdbc:oracle:thin:@//localhost:${port}/${sid}.
Scope: The Oracle probe was designed only for 12c Oracle database. Hence, for 19c Oracle with the user system, it can only connect to the container and not the pluggable database since the connection string used was of 12 oracle db.