Rockstar social club is a huge pile of bullstuff, its worse than the horror called Games for Windows LIVE, this stuff never works, many people just patch the game or use a bypass to play offline but Rockstar keeps patching the damn game because they want to force people to sign up for their damn social club bullstuff.
Honestly just get the patch and play offline without having to deal with this crap its worth it but I wont post a link to it because even though people who use the patch to play without a social club account have a paid version of the game the patch is also linked to the asshats that use it for a cracked version of the game.