Just recently started a cluster server and i am unable to transfer to the other server as the button is greyed out. Currently the main map is The Center and the new map is The Island can anyone assist. (all the settings/mods are the same on each server)

Typically this is caused due to the password option being checked in the transfer menu. Make sure your options in the transfer menu match how you have your servers setup.

(Which map, whether or not survivors only, pvp vs pve, etc.)