Hey folks.
This is an issue that’s popped up with the new Transfer Tokens, something the team are aware of and currently working on a fix for.
We’re seeing this particular error pop up if trying to move to an RP realm, or trying to follow a Guild Master who transferred.
Right now there isn’t a workaround I can suggest but please know that it is actively being worked on.
Sorry for any hassle this might have caused in the meantime 