This due to your -kv flag which you set to "no". You need 2 or 3, which guides Cloudberry Backup to use v2 or v3 Keystone version (consult your Oracle reps). Check this page
The below are full list of flags you may want to use:
[root@localhost]# cbb addAccount -d Display_Name -st OracleCloud -h
CloudBerry Backup Command Line Interface started
addAccount -d Display_Name -st OracleCloud <-un UserName> <-ak ApiKey> <-c BackupContainer> <-ep Endpoint> [-useInternalUrl yes/no(default)] [-reg Region] [-bp BackupPrefix] <-kv no> | <-kv 2 <-tn TenantName | -ti TenantID> > | <-kv 3 [-us < yes | no > <-pn project_name> | <-pi project_id>] <-dn DomainName | -di DomainID> >
-d Display_Name : Display name.
-un UserName : User name.
-ak ApiKey : Api key.
-reg Region : Region. Optional.
-c BackupContainer : Backup container.
-ep Endpoint : Auth endpoint.
-bp BackupPrefix : Backup prefix to differentiate between backups from different computers. Optional, by default is computer name.
-kv Keystone Version: Keystone version. Possible values 2, 3, no.
-pn project_name : Project name. Use only with keystone version 3.
-pi project_id : Project id. Use only with keystone version 3.
-tn TenantName : Tenant name. Use only with keystone version 2.
-ti TenantID : Tenant id. Use only with keystone version 2.
-us Use_scope : Use scope. Use only with keystone version 3. Possilble values yes, no.
-dn DomainName : Domain name. Use only with keystone version 3.
-dn DomainID : Domain id. Use only with keystone version 3.
-useInternalUrl : use internal url. Optional, by default is no. Possilble values yes, no.