Can't load profile with terminal

When i try to load a specific profile with: `flatpak run io.github.antimicrox.antimicrox --tray --profile /PATHtoPROFILE/profile.gamecontroller.amgp` antimicrox starts in tray as expected but no profile is selected.
In the terminal there is also this after I execute the above command:
`Gtk-Message: Failed to load module "canberra-gtk-module`
I also tried it with the .deb version with the same result (except there is no Gtk-Message)
Am I doing something wrong or is this a bug?

**Configuration**
Version of antimicrox: 3.1.5
Used package: flatpak
System version: Ubuntu 20.04