Gitlab-CE 13.3.6 dont connect with Domino LDAP TLS v 2.1

I cant connect my gitlab with Domino LDAP.

My LDAP-config in gitlab.rb

If i try ]# gitlab-rake gitlab:ldap:check

Exception: Connection reset by peer @ io_fillbuf - fd:6

This exception i cant find in google, in forums, anywhere.

Can anybody help me please !!!