So i've been trying to log on and play in order to pal around with a friend, but i've been running into an error in which I log in with correct information (if I use incorrect information, the client informs me) and then run into the error "Failed to launch client!" that pops up in a little window. I've tried re-installing, running as admin, have made sure all my AV is disabled, have verified the l24 files, and have automatically checked/installed all upgrades. However, this error doesn't seem to match other errors i've seen, and I really have no idea how to solve it, so any advice is appreciated!