You need to be in the same organization as the bot

[JungleGeorge]

I tried to register our org bot using !registerbot <botname> and got the message.

Is that cause by something broken or that the bot was originally registered by someone else on the other server?

[Zacix]

!registerbot is currently not working properly...you can use just !register at the moment. I will let everyone know when bots needs to be registered again.