VehicleVendorOptions.cs  79:45    The type or namespace name 'RidableHorse2' could not be found (are you missing a using directive or an assembly reference?)    
VehicleVendorOptions.cs  230:28   The name 'RidableHorse2' does not exist in the current context

This means you need to download and install the latest version of the plugin.

ok thank you!