Re: Help! How do i get split screen co-op to work on ps4?

Creating a second account does work, but make for sure the main account with PS4+ is the primary account. On your PS4 Select (Settings) > [Account Management] > [Activate as Your Primary PS4] Anyone who uses your primary PS4™ system can enjoy the benefits of your PlayStation®Plus subscription.

This is how I play with my friend on split screen when only the primary account has the PS4+. Hope this helps🙂