Bug in CoC NPC Sheet?

Hello! I encountered a bug creating a CoC NPC today. The following error message comes up upon trying to use a combat ability: SyntaxError: Expected "(", ".", "[", "abs(", "ceil(", "d", "floor(", "round(", "t", "{", [ |\t], [+|\-] or [0-9] but end of input found. I'm not sure what's causing this. It's occurring for every combat ability of this NPC but not the other NPCs and PCs I have in the game. Thanks for your time, Marie EDIT: I tried again with the other NPCs and they're also affected now.