desktop audio not working

Hi My obs is compiled on Gentoo Linux and performs well before. When I were trying to use it to record some audio of some streaming, I found that All Global Audio devices Disabled with no any other option available. Please tell me the possible reason. Thanks

As it says in the title, my OBS doesn't record desktop audio exclusively from headphones, when i instead use my desktop speakers it works fine if i go back and adjust audio settings so that the desktop audio is using the right audio device(in this case it would be my speakers). I'm using manjaro...