For an alternative to the Oracle Database, it was necessary to remove the SQLPlus and SQLLoader dependent functionality like ElementBulkerSQLLDR (now deprecated).
If you still want to use this functionality you have to set the two environment properties ORACLE_HOME and TNS_ADMIN.
Windows OS:
set ORACLE_HOME=<Path_to_oracle_home> set TNS_ADMIN=%IS_SHARE%\system\config\oracle
Linux OS:
export ORACLE_HOME=<Path_to_oracle_home> export TNS_ADMIN=$IS_SHARE/system/config/oracle
Add this to the existing environment shell or batch script.