Nostalrius Begins - Quality wow vanilla realm (1.12)

Hey since yesterday i cant use my char cause i cant speak to any channels or contact with no one...need reply plz

Browse to your World of Warcraft Classic\WTF\Account\%account name%\Nostalrius Begins\%character name% folder and delete the file "chat-cache.txt." Log in and see if you can chat. If not, log out and delete the entire WTF folder then log back in and see if you can chat.