Black Screen after recording

[Binsoooy]

Hi im so confused of what's happening on my obs. I've been using it for almost 3 years now and ive never had a problem with it since now. Everytime i record a game it displays the game in the obs but when i finished recording and stopped the recording it still okay, but when i open the video it only shows BLACK SCREEN but with audio of the recording. So can someone explain to me what's going on??