When I try to start my bootable USB drive it just shows this code.
BusyBox v1.30.1 (Ubuntu 1:1.30.1-4ubuntu6.3) built-in shell (ash)
Enter 'help' for a list of built-in commands.
(initramfs) Begin: Running /scripts/casper-premount ... done.
done.
mount: mounting /dev/loop0 on...