Crashes in missions with Lamar (Grand Theft Auto 5)

Crashes in missions with Lamar. I don't know exactly what the account assignment, but it is one of the first where the character is coming to Lamar in the garage of lowriders and the mission to divide by 2 unit, where 1 squad is dressed in Ballas and goes to attack Vagosov, and Vice versa, 2 squad goes to attack the Ballas dressed Vagotomy. I have about after 5 minutes crashes, or rather freezes and when I minimize out a sign with a click of the end now.