I’ve just fixed mine!!
I tried this last night but it didn’t work, but I’ve just read another post that helped…
Load up to the main menu, Options, assistance, change the preset to “All assists” - this is the mistake I made last night, I individually changed each setting to on. DONT DO THAT, change the preset at the top of the page!
Apply and save the changes. Close the sim. Restart the PC.
Load up to the main menu again, options, assistance, now change the preset to “True to life” - again making sure you do it via the main preset.
Apply and save, close the sim, restart the the pc again.
Then you should be good to go! Load the sim up, start a flight, and the ATC box should pop up!
Hope this helps you all out, I know how frustrated I’ve been about it, and I’d tried everything up to this point! Its a bit of a ballache with all the restarting, but hey ho, its sorted it for me 