Yesterday I signed up for Maple Korea. I signed up it all worked well and today I downloaded the game from the site. I downloaded the installer (its name is Maple Install) and when installation reaches 13% it gets stuck. Blue button changes (I do not know what it says it in Korean) and when I click it it says Error code = -40 and a few things in Korean.
Does anyone know what the problem is and can help me fix it?

Installion reached 13% and stuck:

The error code appears when I press the blue button after installation stucks:

Thanks for helpers !