I've had this problem for a while - meaning like a year, and I haven't found a single solution for it.
I can't switch to any channels (including the public ones) except for party and guild, and the only way for me to leave the party channel is to be glitched out by not being in a party.
I've reinstalled the game twice and I still have this problem. Really need to solve this because getting a party for DWL/DWU is downright impossible without it.
Thanks!