RUST Facepunch_Missing_FeatureImplementation

Hello, i keep getting an error message while playing RUST. At first i get disconnected from the server ( i have tried joining different servers and i keep getting the error ) saying “Ticket expired”, and when i try to join back it says Failed to connect ( Facepunch_Connector_Missing FeatureImplementation ) . After waiting for like 10-15 minutes i am able to join, but i still get the error after 10-15 minutes of gameplay. The game is unplayable. I mention that i have reinstalled my Windows 8, and i only have Steam and Skype installed.
Tell me how to fix it, please
Have a nice day