If this is your first time joining guildcraft, and it doesn't allow you to do /register password repeatpassword, then someone probably already registered with your name (if the first time you joined it asked you to do /login (passowrd) ) The only thing you can do here is change your name to a name that hasn't been registered yet. Hope it helped, -Vojkea out
- You got your answer, if this doesnt help make a support ticket here : https://www.guildcraft.org/support/open