Multiseat wont work properly

The player on the keyboard can switch cars using the keyboard binding (tab by default).
The player on a controller can switch cars using the controller binding (none is set by default, please assign a button in his controller, use the "Switch to next vehicle" binding).

Edit: also note that several players can seat in the same vehicle (so you can control different functions of the same car together, if you wanted).

 

The feature works here. I need more information in order to help you: can you explain step by step what are you doing, what results you expected, and what results you are getting? Thanks

 

Ok, I'll need even more detail. Please talk me through the steps you take as if I was 2 years old. Which buttons/keys are you pressing/clicking since you open the game, until you get the unexpected results? Please be as specific as possible, otherwise I am not sure if you are the only person experiencing the problem, of if I'm missing some crucial step that you are doing.
Thanks!

 

Just checking, but what happens if you press TAB (key to switch vehicle) once?

 

You didn't mention at what point you spawn a second vehicle. If you spawn it before enabling multiseat, it should work correctly like you said. If you spawn it after enabling multiseat, try following the same steps except don't press tab, and it should work.

If you still have troubles, please record a video of your issue with the Options > Controls > Hardware tab open.

 

Okay, please send a support report

 

Maybe your firewall, antivirus or whatever is blocking the program from connecting.