Ensure that a common user similar to the following
- create user c##USERNAME identified by adminpwd container=all;
- grant connect,resource to c##USERNAME container=all;
Then run the permissions script provided with the Oracle cartridge.
KB
4229296 describes how the permissions script can be obtained from the FMS.
NOTE: If the CREATE USER command included the username in double quotes then it will make the username case sensitive. All subsequent uses of the username must be in same case as when the username was created (i.e. c##username is different from C##USERNAME or c##USERNAME)
Also refer to KB
4376061 if only the CDB$ROOT is visible when monitoring Oracle pluggable databases
