EDIT: Nvm, everything's solved. It was probably server-related after he downtime, including the crash (probably some message that crashes the game on certain PCs?)
Same problem on my end. The server just went down for a bit 10mins ago (or so), and now with one of my PC's I can log in just fine, but with my main PC the game crashes right when clicking "Lon in" after typing user/pass. It has nothing to do with incorrect password/username btw.
Small update (happened while writting this post, I was testing it between PCs) the following message appears on both PC's now.
