Splash window acting up after KDE install/unistall

Hi there! I have Manjaro 21.2.6 running xfce. I installed KDE and MATE, then uninstalled both. Everything keeps working fine, except two things: 1) the splash screen is displaying square boxes instead of the usual English characters 2) when the screensaver comes up a window appears which asks for the user password -that I can’t even type- and the computer is blocked so I must reboot. Will appreciate your valuable help!