No associated frames file found for image that is the main thing you need to look at in your error log. If there is no frames file, it doesn't know how to split up your png file. When modding, especially with armors, its important to follow the vanilla assets file system. If you move all your armor from items/active/ into items/armors/ then it should work. The armors folder has default frame files for the armors to use. Otherwise, you have to make your own.
Yeah, thats what the mask.png is for. If i remember correctly, Black = hair will show if its here , White = do not show hair if its here. So if the entire file is white, no hair should ever show. Unless that is wrong, then its entire file is black means no hair shows. Either way, should only take you 1 try to figure out which way it needs to be
