Question / Help Desktop Audio not working for game

[OBSUser34]

For some weird reason, OBS Studio won't pick up my Steam desktop audio for the game Garry's Mod. It only picks up audio from chrome. OBS records my mic fine and I can hear everything in-game fine but it doesn't pick up my desktop audio when I'm done recording. Please help, here's my log file : https://gist.github.com/65e4fcc017fd030ab38d305c228876ab