Heya!
Before you enter a nickname, please go to http://s4db.net/#player and do a search for the nickname to see if it's already taken. Nick names already taken will cause you to freeze (new bug that came with the patch) when you try to take them.
If the problem persists with several nicknames displayed as not being previously taken, please submit a ticket at https://support.prosiebensat1games.com/ Optionally, you can try to make a new account and try to register a nickname displayed as not existing on S4DB.
Regards,
AmberSky









