Did a little bit of research. Saw that this has happened in the past sporadically to other people but was fixed by patches.
It happened to me after installing and starting to play Heavensward. I have never experienced it before. The game hangs on a black screen when I exit it, and I have to CTRL-ALT-DELETE and open task manager to close the game. Is anyone else experiencing the same problem? I can give my system stats if needed. Thank you.