While running the enterprise express URL while opening then it gives error https://localhost:5510/em/shell container name not found.

To resolve it for one of the PDB database.

I connected to the PDB database by using ALTER session command.

ALTER SESSION SET CONTAINER=ORCLPDB;

Check the XDB configuration Https Port number:

SQL> select dbms_xdb_config.gethttpsport() from dual;

DBMS_XDB_CONFIG.GETHTTPSPORT()
------------------------------
0

On setting, the port 5500 for ORCLPDB i am getting the following error. Its occur because Container database is using 5500 port same port number:

SQL> exec dbms_xdb_config.sethttpsport(5500);
BEGIN dbms_xdb_config.sethttpsport(5500); END;

*
ERROR at line 1:
ORA-44718: Port conflict in XDB Configuration file
ORA-06512: at "XDB.DBMS_XDB_CONFIG", line 65
ORA-06512: at "XDB.DBMS_XDB_CONFIG", line 90
ORA-06512: at "XDB.DBMS_XDB_CONFIG", line 395
ORA-06512: at line 1

To fix the issue, i tried to change the port number and access the URL:

SQL> exec dbms_xdb_config.sethttpsport(5510);
PL/SQL procedure successfully completed.

Now, i am able to access the URL for this PDB with new port number: