Seeking help with Java Error NumberFormatException For input string: "US" while upgrading 12.1 to 12

Attempting to upgrade a 12.1 database to 12.2.

• Copied 12.1 database to test server
• Installed 12.2 Oracle binaries
• Set environments

  •   export ORACLE_BASE=/opt/oracle/orauser

  •   export ORACLE_HOME=/opt/oracle/orauser/product/dbms/12.1.0.2

  •   export ORACLE_SID=CSDMO

  •   export JAVA_HOME=/nfs/oracle_linux_share/bin/jdk_1.8

  •   export PATH=${JAVA_HOME}/bin:${PATH}

• Ran DBUA from 12.2 binaries
• DBUA finds 12.1 database (no issues)
• DBUA Pre-req checks finds following errors:
  • Error in preupgrade tool execution.  For input string "US" (More detail shows nothing)
  • Error loading pre-upgrade execution results
• Located Oracle knowledge base article (Oracle 12.2.0.1 Pre-upgrade fails - SEVERE: For input string: "Us" (Doc ID 2340269.1) and followed directions