Hi,
due to a small bug, you cannot enter a guildhouse in version 019. To fix this just go to your planeshift installation folder, under /art/world and rename gh_law.zip into guildlaw.zip , then restart planeshift and you should be able to enter the guildhouse.
NOTE: guildhouses are supposed to be locked, so if you receive a "Entrance locked" it's not a bug, it's made by purpose. You need a key to enter, which only the members of the guild owning the house have.