I don't know if this is the same issue, but try going into the folder for Neowiz in the ProgramData folder(you will have to enable hidden folders). There you wanna click through everything and click on the actual launcher executable. When the little message(I have no idea what it says) pops up just leave it open and then try to log in from the site again. I have to do this each time.. manually start the launcher and THEN log in via the site.
Users Online 1