First try going to Settings>Special> and add DisableScreenFlash

What you also might want to try is avoid having other programs running displayed behind Project: Gorgon. And to disable overlays that run over top of the game, like Steam, Discord, and graphic card overlays. For Steam in particular try going to Steam>Settings>In-Game> Uncheck "Enable the Steam Overlay while in-game".

Hopefully, someone that has had the problem and has fixed it will drop into the thread with advice.