Linux Mint OpenLDAP Client Configuration

Hello

I have setup an OpenLDAP Server in Ubuntu 22.04 using the tutorial from computingforgeeks
I also setup the client in Kubuntu and Linux Mint using also the tutorial from computingforgeeks:

In Kubuntu worked out of the box. But in Mint (which is the distro I wan to use for my Users) it doesn’t work. When I try to switch user in order to try to login with a user from LDAP the screen blacks out and then returns to login screen only with the local User. Has anyone made something like that work with Linux Mint 21.2 Victoria? Please help. I don’t wan to use Kubuntu because my users are not well versed with Linux and I will have problems