Letters don't appear in virtual consoles in debian

Firstly, I switched to some virtual console with Ctrl+Alt+F2-6 even right after installing Debian 11 with KDE and, secondly, I tried to type something in that console. No letters appear, but it works with numerals. As you know, a login prompt appears first. So I can't login in the system via those consoles. Initially, logged in through the GUI.