mysterious transmission on the etk 800-series

so when i change transmissions on the etk 800 there is a transmission called 6-Speed Manual Transmission (Experimental) and when i select it the tachometer disappears and i wanna know what is it and why is it there

 

Does that show up in Safe Mode as well? I don’t recall seeing that and I use the ETKs quite often

 

checked in safe mode, is there aswell

 

Hmm then I’m not sure what that is

 

Do you notice any difference when driving with it?

 

I can't drive with it because the tachometer dissapears and I can't turn the car on, and when I press the gas pedal the car doesn't move.