The error you are seeing is related to Oracle and is not specific to vTDM.
The error definition from Oracle is:
ORA-65096: invalid common user or role name
Cause: An attempt was made to create a common user or role with a name that was not valid for common users or roles. In addition to the usual rules for user and role names, common user and role names must start with C## or c## and consist only of ASCII characters.
I found some useful information from two different websites, which I will share. In short, you need to engage your Oracle DBA to help address this issue. The below information was taken from https://stackoverflow.com/questions/33330968/error-ora-65096-invalid-common-user-or-role-name-in-oracle
In oracle 12c and above, there are two types of databases:
1) container (CDB)
2) pluggable database (PDB).
Therefore, If you want to create a user, you have two possibilities:
1) You can create a container user aka common user Common users belongs to CBD’s as well as current and future PDB’s. It means it can performed operation in Container or Pluggable according to Privileges assigned. create user c##username identified by password;
2) You can create a pluggable user aka local user. Local users is purely database that belongs to only single PDB. This user may have administrative privileges but this only belongs to that PDB. for that, you should connect to pluggable datable like that alter session set container = nameofyourpluggabledatabase; and there, you can create user like usually create user username identified by password; don't forget to mention tablespace, it can be useful during importation. see this for more information about it https://docs.oracle.com/database/121/SQLRF/statements_8003.htm#SQLRF01503