I am currently running Unity 2019.1.10f1 on Ubuntu 16.04 operating system. I imported Vehicle Physics Pro - Community Edition into Unity and tried to run demo scenes in Scenes folder. In none of the demo scenes, i was not able to start the car even though i am following the instructions in Help(?) -> Controls -> Startup. I can not ignite the engine with "K". Do you have any idea what i am doing wrong? Thanks in advance.