The quest log isn't complete yet, so you'll have to guide yourself through the game to continue, as you can't validate the quest in the log.
Idk if you're stuck and can't keep going (if so I already answered to someone esle above if you want to know what to do) or if you just wondered why the quest didn't validate even tho you finished Lakeview.
I'm writing a guide of the game right now to help stuck player and I should post it in a few day if the author is alright with it.