What the title says.
For some reason driver 18.7.1 breaks whatever type of OpenGl GZDoom uses to render the game. All sprites [enemies, items, objects] are not displaying at all and are invisible. This happens in both VR and on a monitor.
Rolling back to 18.6.1 fixes the problem, so it is definitely a problem on your driver's side and not GZDoom. This problem affects Doom, Doom II, Heretic, and Hexen, all of which use this launcher.
Fix your drivers AMD. Not being able to play Doom properly is the sort of thing that will make or break a future GPU purchase decision.