System error (10) when logging through launcher

[ShadowLane]

When I tried logging through the launcher today, I got "system error (1)" on the verification code panel and the verification code was never sent to my email, I had to log through the website, which delivered the code properly - and it could only be used in the website login, as it was giving "wrong code" error when used in the launcher verification window.

[Azaruke]

Got this same problem after last mainteance.