Default [Q] System VPN app Problem

Hello mates!

I have a problem with my Jiayu S2. Android 4.2.2

I try to setup a new VPN connection.

At first i can open the VPN option in the settings.
I create a new connection wit my server und login.
After saving my connection the application was crasht (Translate Message: "settings" was closed) and i am back tu settings main menu.

And if iopen now the VPN menu, it crasht permanently wit the same Message ("settings" was closed) - translate but i use a other language.

Thanks for your support!