Hi,
we are using the latest plugin version and once a day (40 player population~) 1-2 players are tellung us they cannot mount their vehicles.
(So far modular car, horse, minicopter)
Even admins cannot mount the "driver seat".
While you you just cannot mount horse/minicopter, you will instantly swap seats when mounting a modular car to the passenger seat instead.

After one or two relogs the problem is solved.
Any idea? Maybe dying, or porting while on the seat and the plugin/facepuch still remembers the seat as occupied?

If the message cannot be used is not displayed, it is not a bug of this plugin