Problem with Cyrillic characters.

Hello Everyone!

When importing users from a domain AD, there is a problem with displaying Cyrillic usernames. An unreadable set of characters is displayed instead of the name.

Ubuntu 20.04.3
rtuser@rts:~$ env | grep LANG
LANG=ru_RU.UTF-8

[122862] [Mon Jan 31 06:33:53 2022] [debug]: Processing user helpdesk (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:604)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: Found new user helpdesk to create in RT (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:895)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: RT Field RT Value → LDAP Value (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:657)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: EmailAddress unset => (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:667)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: Name unset => helpdesk (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:667)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: RealName unset => ХелпÐ�еÑ�к (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:667)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: Imported 145/146 users (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:579)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: Processing user tost (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:604)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: Found new user tost to create in RT (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:895)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: RT Field RT Value → LDAP Value (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:657)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: EmailAddress unset => (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:667)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: Name unset => tost (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:667)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: RealName unset => Ð�олÑ�зоваÑ�елÑ� ТоÑ�Ñ�овÑ�й (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:667)
[122862] [Mon Jan 31 06:33:53 2022] [debug]: Imported 146/146 users (/opt/rt5/sbin/…/lib/RT/LDAPImport.pm:579)