Hello! I am a small content creator, and I recently finished the game Portal and wanted to record myself playing it for my channel. At first, it showed up fine. Everything was working how it should be. The screen and graphics were accurate. However a week or so later, I tried recording it on OBS, there was just a blank black screen. As soon as I switch to Portal, the recording goes pitch black until I exit it. This isn't a problem with other Steam games, I tried one. I've tried Display, Window, and Game Capture to no luck. If someone could help me that would be appreciated.