11.2.0.4: Upgrade failing with error about DBMS_XDBT package

It is a new year, and we should not waste any time visiting My Oracle Support to learn from their article "Upgrade to 11.2.0.4 Failed with ORA-24344 due to DBMS_XDBT Package" via note ID 1953099.1 to find out what log file gets written to during installation, what Oracle Text is (from the included referenced note), and several ways you can resolve this problem!