same Problem here! Only the drones came up on all three types of taxi.
Here is the relevant part of the logfiles that comes up after calling a taxi
Failed to call hook 'AddStrike' on plugin 'DroneTaxi v1.0.14' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.DroneTaxi+Taxi..ctor (UnityEngine.Vector3 spawnPoint, UnityEngine.Quaternion rot, System.Int32 type) [0x0053b] in <24ea85eca4894fe0998127e2c570f998>:0
at Oxide.Plugins.DroneTaxi.AddStrike (Oxide.Core.Libraries.Covalence.IPlayer iplayer, System.String command, System.String[] args) [0x001e8] in <24ea85eca4894fe0998127e2c570f998>:0
at Oxide.Plugins.DroneTaxi.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x001fc] in <24ea85eca4894fe0998127e2c570f998>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d4a0be71194349e98f7b43231b9cea3b>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <b974d7a025404888bcdd55b51f29c440>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <b974d7a025404888bcdd55b51f29c440>:0