Moved LDAP server and now all of my users are blocked

We are in the process of moving to a new domain: basically from domain.wan to us.domain.com. I’ve changed the DNS entry for our gitlab server to gitlab.us.domain.com and updated the hosts and the config file. I can get to the page.

Now we also have migrated all of our users to the new domain and now no one can login or push (all users are blocked?) and I can’t log in to the web interface with my local admin account.

I see both that the user can’t authenticate and

Could not authenticate you from Ldapmain because "Undefined method provider’ for nil:nilclass".`