LDAP/AD Integration

I am trying to set up UrBackup 2.5.27 to let me log in via LDAP/AD and when I have everything properly filled in I cannot even test the connection. Is AD authentication completely broken at this point? I am testing UrBackup as a replacement for our existing Veeam Endpoint backup infrastructure as I don’t think we will ever be going back into the office, and Veeam does not work great remotely. But if I cannot get AD logins to work so people can restore their files that way it will be a major issue.