This depends if the Xbox version of the game supports the tileset that is used for the Arrival area, because it is possible that the console version of the game is behind in updates there. Most issues surrounding this area where people cannot load in is often because they are using an older version of the game that did not add in the tileset (Medieval Rurals 2 by Zwerkules).
The only work around here I can think of is the following:
1) Make sure you are using the latest version
2)
Contact Beamdog, since it is something from their end if it's an issue with the latest version not including the new tilesets.
There's not much we can do on our side at this stage since this isn't a bug and seems to be an issue isolated to the xbox version your friends might be using.