UE4 Editor crashes after using the 'Play' function - Signal 11 Linux

I did check for
if(GEngine)
GEngine->AddOnScreenDebugMessage();

I think the issue is trying to find the name of AActor by using:
UGameplayStatics::GetPlayerCharacter(GetWorld(), 0))->GetName().

It crashes on this line. I am attaching the other things as a .txt file.link text
I saved it as a .txt file.