Installled openldap following https://www.howtoforge.com/how-to-install-openldap-server-on-debian-12/ only things I changed are our server IP address to my ip address, your dc=mydomain,de=local to mine dc=xyz,dc=de xyz is just a fake not my real domain everthing looks fine till the lam manger login mask, that looks still like yours but what is the password, that one I entered while installing does not work, that one I should write down, does not work (misswriting not posible as copy and past) And now?
Try installing again? The password is not shown, from where did you cut and paste it? Any exotic characters in the pasword string?