Problem creating online session using advanced session

Hi ! So i’m fairly new to UE and trying to learn some stuff and make an simple online game using advanced session.

However I cannot create a session on standalone it always return “Net Driver Already Exists” when using network error event

I’ve been watching many videos or read about it and doesnt matter how I try to accomplish it it won’t work i keep getting the same error

Does anyone have encounter this problem before and how did you solve it?