[psycho turkey]

I had the same problem. Found I had installed LALHANGAR (MOD-HANGAR) incorrectly. The instructions say :

1. Copy/paste MODS folder in your IL2 directory

I was reviewing file structure and decided to copy/paste Mod LAL_Hangar in the MODS folder, this solved the problem for me. I can now save missions in the Thailand map.

Hope this helps.