the live match is not working
First of all, if you weren’t aware, the app only works if you are playing the game on PC, it does not work for console or GeForce NOW.
If you’re on PC, a common fix is closing your game, then closing Overwolf like so, from your system tray (https://i.imgur.com/3O6483T.png). Then re-opening Overwolf, then launching your game.
