Hey Dan K., Was this character initially created using the Builder? If so, any classes added via the Builder will be greyed out as in your screenshot, and can only be incremented in level via the Builder's level up functionality. That said, if you want to level up the character manually, one workaround is to add a Class via that modal on the sheet with the same name, "Rogue", and level 1. That will make you a "Rogue 3 Rogue 1" on the little class description at the top of the sheet, but it should correctly update your max level & proficiency bonus, and allow you to make your manual level up changes thereon. Aside from that, you'll either need to use the Builder to level up (if the Level Up button is greyed out, you may need to temporarily clear the Species and Subspecies fields on that modal first - that should make the button become accessible again, then reselect Elf and Drow via the Builder), or rebuild the character manually, without a class added via the Builder. All this said, we'd love to hear about the bugs preventing you from using the Builder in full, so we can address them! This thread , or a helpdesk ticket are the best places for those reports