Error Accessed None 'CallFunc_GetPlayerCharacter_ReturnValue' from node SpawnActor Bom BP in graph 'EventGraph' in blueprint turret

Hi, I am getting an error every time I join in the game and the actor is spawned when i start the game.The error is Error Accessed None ‘CallFunc_GetPlayerCharacter_ReturnValue’ from node SpawnActor Bom BP in graph ‘EventGraph’ in blueprint turret. But the game keeps working good with error, but i dont know if had a problem if i compile the game.
Anyway how can i fix the error?

Thanks youalt text