try `sudo groupadd plugdev` then `sudo usermod -aG plugdev $USER` then reboot.

try

sudo groupadd plugdev

sudo groupadd plugdev

then

sudo usermod -aG plugdev $USER

sudo usermod -aG plugdev $USER

then reboot.

try `sudo groupadd plugdev` then `sudo usermod -aG plugdev $USER` then reboot. - Bazzite