Failed to create RCU schemas when creating JCS

When i was creating a JCS instance in past. I had faced an issues where it failed at schema creation on DBCS.

Failed to create RCU schemas. Verify Database connectivity to XXXXX:1521:PDB1.YYYYY.oraclecloud.internal with sys -dbRole sysdba and make sure the Database has enough available space>

First thing is to check if database and listener are up. If they are then check the security rules.

- In the service console go to the network tab.
-  Search <servicename>/db_1/ora_p2_dblistener using the word "ora_p2_dblistener"
- Select update
- Check the status if its disabled , enable it.

Now you should be able to proceed to create the JCS instance.