Turning off PermitRootLogin in sshd prevents any user to connect

Hello! I have a Debian bullseye virtual machine. I read in OVS manuals that allowing ssh login as root is non-secure, so I decided to turn it off in /etc/ssh/sshd_config by commenting the line `PermitRootLogin yes`. After that I rebooted the server and I couldn't login with absolutely any user via ssh, not only with root. It asked for password and then always answered "Permission denied". Why does this setting affects other users than root?