st does this when you don't give it the right font path and config. There is one compiled in, and that's what it's using if you aren't passing a font when you s

st does this when you don't give it the right font path and config. There is one compiled in, and that's what it's using if you aren't passing a font when you start it. Right now, whatever font it's trying to use doesn't exist, and your screenshot is a typical result of that.