Make sure your graphics card drivers are up to date and then try to re-launch the game. There are also some players who report that having an Oculus Rift connected to their PC might cause some compatibility issues, so if you have a Rift, please disconnect it:
This thread was added on March 18, 2019, with posts from Jens_Erik.
What sort of other hardware are you using? Motherboard, ram, etc.