ORA-01045 when attempting to connect to PDB. User has CREATE SESSION privilege, but I Oracle says they don't The user has been granted CREATE SESSION but i can only connect to CDB and not the PDB. Why is this? I'm trying this in SQL developer. I have Oracle 19c.
Why do you want to create a common user instead of creating a user in PDB?
For a common user C##test from CDB
grant create session to c##test container=all; 

or
From PDB login as sysdba/dba/pdbadmin
grant create session to c##test;