Not exactly sure what happened, but I been playing everyday since the launch of Lost Ark on Na/EU. I had no issues launching and logging into Lost Ark until this past week after the weekly update was applied, I began running into launching issues.
I had trouble launching the game a couple of days ago as well, but today I waited for around 30 mins for the game to launch, but it wouldn’t. Not exactly sure what was in that weekly update that may have caused this to happen.