Virtual machine transparent background

Hi, so I installed oracle virtualbox with pacman and am trying to install metasploitable. When I launch start, the background is transparent.
Metasploitable usually has black background with white text and I can only see the white text but the background is transparent and I have to use it on like black wallpaper in order to see
This also happens with other virtual machines I installed
I also deleted and reinstalled but no luck(also tried pamac whatever that is)

How to fix? Thanks.

Disable window transparency at the settings of your desktop environment?

how do i do that? I use xfce

Settings → Window Manager Tweaks → Compositor