The new Istanbul airport locks up at 54% while loading, no matter the antialiasing option, even with clear weather. All other airports load fine. I load no mods and I use the custom carriers list (Leslie, Field Air, Ozzy, etc). Machine is an i9-9900K with 64 GB of memory and the RTX 2080 Ti video card, so that ain't it.
Note that since the max attachment size on here is 20 KB, and the log file is 46 KB, I cannot attach the log. I'll therefore include some excerpts from it, notably, the exceptions thrown. There are also a lot of "RUNWAY CROSS ERROR: 36 x 18" lines in it, one for each runway in fact. This is the very end of the log:
Airptype loaded: Default , DEFAULT
Airptype loaded: Narrow_default , DEFAULT
Airptype loaded: Prop_default , DEFAULT
Airptype loaded: Regional_default , DEFAULT
Airptype loaded: Turboprop_default , DEFAULT
Airptype loaded: Wide_default , DEFAULT
Wait for Speech init!
NullReferenceException: Object reference not set to an instance of an object
at DatTimetable.BuildTimetable (System.String ac_icao) [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