To clarify, if I install mkusb in 18.04 the USBs it makes boot with grub 2.02. If I install mkusb in 19.10 the USBs it makes boot with grub 2.04. Grub 2.02 boots ISOs, grub 2.04 does not boot ISOs.
To clarify, if I install mkusb in 18.04 the USBs it makes boot with grub 2.02.
If I install mkusb in 19.10 the USBs it makes boot with grub 2.04.
Grub 2.02 boots ISOs, grub 2.04 does not boot ISOs.