Note: The first launch of the game must be done as follows instructions below:

Turn off the internet
Start the game
Enter age over 18
Turn on the internet
Click on the Accept button and close the window with an error connecting to the network until the main menu is displayed
After the window with the account, a lock appears, close the game completely, turn off the internet and start the game again.
Subsequent launches should be carried out without the Internet.

How to fix License Error?
Use NetGuard to prevent Gangstar 4 from connecting to Wifi or mobile networks.

Firstly, move the Installed Obb Folder to another folder and uninstall the Gangstar Vegas Apk from the phone.
Go to Google Play Store and search for 'Gangstar Vegas
Start downloading the game after 1% of downloading cancel it.
Done! you got the license for your game on a particular google id.Now-Again Move your game OBB folder to Android/OBB/.
Install the provided mod apk.
Launch your game and enjoy it. (don't forget to turn off your phone's internet connection

How to avoid getting banned your Account?
Read carefully and follow the instructions to avoid getting banned.

Step 1: Install InternetGuard or NetGuard from Google Play. This is an app that helps you block Gameloft�s control.
Step 2: Open InternetGuard or NetGuard, block all network access of Gangstar Vegas. Remember to activate the InternetGuard or NetGuard app.
Step 3: Open the game. The application will notify you that it cannot connect to server, click Retry.
Because the network access was blocked, Gangstar Vegas could not connect to the server, so they cannot ban us. You will successfully enter the game.