Can't add values to vocabulary i10n subjects as tenant administrator

• nuxeo-multi-tenant installed
• activate tenant isolation
• create new domain
• create new user and assign as tenant administrator
• log in as tenant administrator
• Admin > Vocabularies
• select i10n subjects
• Add a new Vocabulary Entry
• Parent > Add

Weird double display (see screenshot). Cannot access the parent items. Error: javax.servlet.ServletException: Invalid request - component not found. in logs.

Works fine when logged in as global Administrator.