I've just had a similar problem. It's caused by a conflict with AppArmor's slapd policy (in /etc/apparmor.d/usr.sbin.slapd). I switched apparmor's policy to complain mode with aa-complain and it fixed the problem.
I've just had a similar problem. It's caused by a conflict with AppArmor's slapd policy (in /etc/apparmor. d/usr.sbin. slapd).
I switched apparmor's policy to complain mode with aa-complain and it fixed the problem.