After the recent character sheet update, the defense rolls have been non-functional. The value and data-formula for the sheet defense modifier is missing closing brackets for @{weapon_style_defense_switch. Furthermore, the defense die has to be changed manually and values need to exist for shield damage and current fatigue rather than it defaulting to 0, for the total defense mod to be summed correctly. Adding the curly braces to the variables with the HTML editor and switching the die type once seems to fix it. The error is in line 814 of the HackMaster_5E.html file On top of that, many of the character sheets in my campaign have had their stats reset (don't know why some others haven't).