GTA 5 Activation failure with offline mode launch [FIX]

Case you already fixed the ScripthookV issue with the backup files, you may face this new issue:

Game loads but says that your activation failed.

What to do? 

1 - Close the game
2 - Temporary remove or rename the commandline.txt file from game folder
3 - Load the game, when you see the "must update" message, close the game
4 - Restore the commandline.txt file and open the game again :)