I have created a simple character with movement code which extends the Character class, and then created a blueprint based of it. And then I placed that blueprint in the map I made and whenever I try to hit Play, the engine freezes and raises it’s ram usage up to 4 gigs and up.
It could be a couple of things… but make sure you don’t have a player start and the player character blueprint out at the same time. This has been known to crash on occasion.
Also, you might want to get into the habit of testing with a standalone client rather then in the editor. This way if your game does crash you won’t have to worry about the editor itself stalling.