I found that file. It seems to be loading properly and goes through a list of incoming planes. This section follows that.
Search airplane type in airplanes.txt: 320
(Filename: C:/buildslave/unity/build/artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)
classcode: NARROW_BODY_JET
(Filename: C:/buildslave/unity/build/artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)
Custom plane found: A320
NullReferenceException: Object reference not set to an instance of an object
at Airfield.TestTerminal (.Road terminal, .Airplane ap, CATEGORY maxcat) [0x00000] in <filename unknown>:0
at Airfield.GetFreeTerminal (.Airplane p, Boolean force) [0x00000] in <filename unknown>:0
at Airplane.InitTerminal () [0x00000] in <filename unknown>:0
at Airplane.Init (.Action_t iact) [0x00000] in <filename unknown>:0
at Game.CreateAirplane (.Action_t action) [0x00000] in <filename unknown>:0
at Game+<LoadMap>c__Iterator4.MoveNext () [0x00000] in <filename unknown>:0
at UnityEngine.SetupCoroutine.InvokeMoveNext (IEnumerator enumerator, IntPtr returnValueAddress) [0x00000] in <filename unknown>:0
(Filename: Line: -1)
GfxDevice: creating device client; threaded=1
GfxDevice: creating device client; threaded=1
GfxDevice: creating device client; threaded=1