Currently on level 2 with a custom class. I made sure to allow the use of heavy armor during character creation. But even when I find LIGHT armor (steel or silver for example) It gives me the "You are not allowed to equip this" message. Oddly enough I'm wearing a steel piece with AC 2, but if I try to equip a brand new steel cuirass with AC 4 it tells me I can't.

Is my game bugged? Not sure what to do about this.