Players are reporting issues with the EQ2/LoN launchpad on the EQ2 Forums.
A response from Dexella:
Hi all,
We are working on the Launchpad issue now. It is currently affecting all games. We will update you when more information is available.
NOTE: If your game client is already up to date, you can launch EQ2 by directly starting the EverQuest2.exe program.