After the last patch DCS 2.5.6.57264 Open Beta, I can not open the communications menu with any of the planes, (I tested F16, F-18, F-15). I tried with easy radio and normal radio options, and I used '\' and Com 1, Com 2 of each plane.
without the radio menu, the game is completely unplayable.
I found the error, my autoexec.cfg was wrong:
2020-11-07 05:31:26.965 ERROR Lua::Config: load error Config/main.cfg:[string "C:\Users\ice_b\Saved Games\DCS.openbeta\Config/autoexec.cfg"]:5: '=' expected near 'there'.
Close it.