PDB Conversion (txkCreatePDB.pl) is failing with PLS-00201: identifier 'DBMS_PDB.CHECK_PLUG_COMPATIB

Followed Doc ID 2567103.1  While converting it to PDB we are getting below error. Please look into the below error and suggest.

Source

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EBS version: 12.2.6

AD/TXK version : C.12

DB version: 12.1.0.2

OS: Linux 7

Rac Enabled- Yes/No:- Yes

where is the database hosted?:- Oracle Exadata Cloud@Customer Gen 2

multi-tenant: NO

Target

===========

EBS version: R12.2.6

AD/TXK version : C.12

DB version: Upgraded from 12c to 19c

OS: Linux 7

Rac Enabled- Yes/No:- Yes

on prem or EXACC:- Oracle Exadata Cloud@Customer Gen 2

multi-tenant: YES

 Command Used to Convert :

 perl $ORACLE_HOME/appsutil/bin/txkCreatePDB.pl \

-dboraclehome=/u02/app/oracle/product/19.0.0.0/dbhome_3 \