Description of problem:
Trying to delete an organizationalUnit entry fails with this message:
Error: object of type 'Namespace' has no len()

Version-Release number of selected component (if applicable):
# cat /etc/redhat-release
Red Hat Enterprise Linux release 8.2 (Ootpa)
# rpm -qa | grep 389-ds-base
389-ds-base-1.4.2.12-2.module+el8dsrv+6428+6e54c518.x86_64
389-ds-base-libs-1.4.2.12-2.module+el8dsrv+6428+6e54c518.x86_64
#

How reproducible:
Always.

Steps to Reproduce:
1. Create the entry:
# dsidm -D "cn=Directory Manager" -b dc=example,dc=com ldap://localhost:389
organizationalunit create
Enter password for cn=Directory Manager on ldap://localhost:389:
Enter value for ou : toDelete
Successfully created toDelete
#

2. Get the entry details:
# dsidm -D "cn=Directory Manager" -b dc=example,dc=com ldap://localhost:389
organizationalunit get toDelete
Enter password for cn=Directory Manager on ldap://localhost:389:
dn: ou=toDelete,dc=example,dc=com
objectClass: top
objectClass: organizationalunit
ou: toDelete

#

3. Try to delete the entry:
# dsidm -D "cn=Directory Manager" -b dc=example,dc=com ldap://localhost:389
organizationalunit delete "ou=toDelete,dc=example,dc=com"
Enter password for cn=Directory Manager on ldap://localhost:389:
Error: object of type 'Namespace' has no len()
#
# dsidm -D "cn=Directory Manager" -b dc=example,dc=com ldap://localhost:389
organizationalunit delete ou=toDelete,dc=example,dc=com
Enter password for cn=Directory Manager on ldap://localhost:389:
Error: object of type 'Namespace' has no len()
#

Actual results:
The command fails.

Expected results:
The command should work.

Additional info: