Character jerking with Movement Replication Bug?

I cant get the third person demo template to play as a listen server it just crashes as a template for me to test to see if replication works out of the box for the movement. Im using the C++ template version. I start the server on my computer with the listen command added and when the client joins the server computer freezes and i have to Alt tab to crash the exe. I also tried adding more player starts to see if that would resolve it

I use the following command . Open test?listen

Nvm: I solved it by hosting the game on another PC and joining with another and it finally works. Guess UE4 just doesnt like the computer i was hosting on first . It does not jerk on the Third Person demo as switching hosts what should i do?