The restart book green gives the error "Skill is still on cooldown" if you use it with the Ask Popo ability in cooldown.
If you manage to use the green book (without the cooldown of Ask Popo skill), the game closes.
The brown book does not work.
Tomorrow will upload a video reproducing if the development team feels it necessary. I do not upload it today because to show the client closing I need to reset my skills with a NPC and I already did it today.