I'm on Arch Linux and am using i3wm-gaps. Everything works ok aside from the sounds. I get "Failed to play sound: IO Error" (appears where the module is in polybar) when I get an email.
Can't reproduce on my system, but the error comes from canberra-gtk-play -i message (launch.py executes this command).
You may disable sound for polybar-gmail with -ns (or --nosound) argument.
I'm on Arch Linux and am using i3wm-gaps. Everything works ok aside from the sounds. I get "Failed to play sound: IO Error" (appears where the module is in polybar) when I get an email.