Loading a blueprint from turret class crashes the engine

Can you post the crash you are getting?

On the first video of making a 2D tank game they have you make a BP_Turret object and when i try starting it up my engine crashed every time.

I cant get it to crash but it freezes while VS gives this.

Unhandled exception at 0x00007FFDEA7BFF95 (UE4Editor-CoreUObject.dll) in UE4Editor.exe: 0xC0000005: Access violation writing location 0x0000009074E00FD8.

If there is a handler for this exception, the program may be safely continued.