A new update for RetroArch released few days ago, update RetroPie Setup script and then reinstall the Retroarch package and try again.
Did you have add the the below line into /boot/firmware/config.txt file ?
kernel=kernel8.imgGeneral discussion relating to using RetroPie and gaming. Please do not use for help/support requests.
Share your ideas and suggestions for RetroPie. You can also use this area for development discussion.
Contributions to the project are always appreciated, so if you would like to support us with a donation you can do so here.
Hosting provided by Mythic-Beasts. See the Hosting Information page for more information.