When clone a pluggable database from remote CDB database, the following error occurs:
SQL> create pluggable database PDB1 from PDB1@remote_db_link;
create pluggable database PDB1 from PDB1@remote_db_link
*
ERROR at line 1:
ORA-17628: Oracle error 65036 returned by remote Oracle server
ORA-65036: pluggable database not open in required mode
SOLUTION
Make sure source PDB is opened on all instances, otherwise on source CDB:
SQL> alter pluggable database pdb1 open instances=all;
Pluggable database altered.
If still not working, then check “LOCAL_UNDO_ENABLED” enabled or not.